diff --git a/CHANGELOG.md b/CHANGELOG.md
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diff --git a/README.MD b/README.MD
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+<!-- BEGIN_TF_DOCS -->
+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >=0.15 |
+| <a name="requirement_google"></a> [google](#requirement\_google) | >= 3.89.0 |
+| <a name="requirement_random"></a> [random](#requirement\_random) | >= 3.1.0 |
+| <a name="requirement_vault"></a> [vault](#requirement\_vault) | >= 2.17.0 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_google"></a> [google](#provider\_google) | >= 3.89.0 |
+| <a name="provider_google-beta"></a> [google-beta](#provider\_google-beta) | n/a |
+| <a name="provider_random"></a> [random](#provider\_random) | >= 3.1.0 |
+
+## Modules
+
+No modules.
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [google-beta_google_secret_manager_secret.registry_sql_client_cert](https://registry.terraform.io/providers/hashicorp/google-beta/latest/docs/resources/google_secret_manager_secret) | resource |
+| [google-beta_google_secret_manager_secret.registry_sql_user_password](https://registry.terraform.io/providers/hashicorp/google-beta/latest/docs/resources/google_secret_manager_secret) | resource |
+| [google-beta_google_secret_manager_secret_version.registry_sql_client_cert](https://registry.terraform.io/providers/hashicorp/google-beta/latest/docs/resources/google_secret_manager_secret_version) | resource |
+| [google-beta_google_secret_manager_secret_version.secret-version-basic](https://registry.terraform.io/providers/hashicorp/google-beta/latest/docs/resources/google_secret_manager_secret_version) | resource |
+| [google_sql_database.cloudsql_database](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/sql_database) | resource |
+| [google_sql_database_instance.cloudsql_instance](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/sql_database_instance) | resource |
+| [google_sql_ssl_cert.client_cert](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/sql_ssl_cert) | resource |
+| [google_sql_user.cloudsql_user](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/sql_user) | resource |
+| [random_password.cloudsql_user_password](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/password) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_authorized_cidrs"></a> [authorized\_cidrs](#input\_authorized\_cidrs) | Authorized networks CIDRs to connect to Cloud SQL instance. | `map(string)` | `{}` | no |
+| <a name="input_backup_configuration"></a> [backup\_configuration](#input\_backup\_configuration) | The backup\_configuration subblock for the database setings | <pre>list(object({<br>    enabled          = bool<br>    start_time       = string<br>    location         = string<br>    retained_backups = number<br>  }))</pre> | `[]` | no |
+| <a name="input_cert_common_name"></a> [cert\_common\_name](#input\_cert\_common\_name) | Certificate Common Name. | `string` | n/a | yes |
+| <a name="input_database_version"></a> [database\_version](#input\_database\_version) | Database type and version. Supported values = {MYSQL\_5\_6, MYSQL\_5\_7, MYSQL\_8\_0, POSTGRES\_9\_6,POSTGRES\_10, POSTGRES\_11, POSTGRES\_12, POSTGRES\_13, ...}. See {Instance settings documentation} | `string` | n/a | yes |
+| <a name="input_db_name"></a> [db\_name](#input\_db\_name) | Full name of the SQL database. | `string` | n/a | yes |
+| <a name="input_deletion_protection"></a> [deletion\_protection](#input\_deletion\_protection) | If set to true, you protect an instance from being deleted. | `bool` | `true` | no |
+| <a name="input_disk_autoresize"></a> [disk\_autoresize](#input\_disk\_autoresize) | Whether if the disk can grow when more space is needed. If disk\_autoresize=true do not set disk\_size as terraform apply would try to set the disk\_size | `bool` | `true` | no |
+| <a name="input_disk_type"></a> [disk\_type](#input\_disk\_type) | Type of disk used on the CloudSQL instance VM | `string` | `"PD_SSD"` | no |
+| <a name="input_instance_name"></a> [instance\_name](#input\_instance\_name) | Full name of the SQL instance. | `string` | n/a | yes |
+| <a name="input_maintenance_window"></a> [maintenance\_window](#input\_maintenance\_window) | Maintenance window to update/patch the VM. It can be rebooted during this maintenance window | <pre>list(object({<br>    day          = number<br>    hour         = number<br>    update_track = string<br>  }))</pre> | `[]` | no |
+| <a name="input_module_depends_on"></a> [module\_depends\_on](#input\_module\_depends\_on) | n/a | `any` | `null` | no |
+| <a name="input_network"></a> [network](#input\_network) | Self link of the VPC network | `string` | n/a | yes |
+| <a name="input_public_ip"></a> [public\_ip](#input\_public\_ip) | assign a public IP to this CloudSQL instance. Attention: you need Security approval to give a public IP to your CloudSQL instance. | `bool` | `false` | no |
+| <a name="input_region"></a> [region](#input\_region) | The region to host the resources in. | `string` | `"europe-west1"` | no |
+| <a name="input_require_ssl"></a> [require\_ssl](#input\_require\_ssl) | If require SSL, the connection port will be 3307, otherwise 3306. | `bool` | `true` | no |
+| <a name="input_tier"></a> [tier](#input\_tier) | CloudSQL instance machine type (service tier). See {Instance settings documentation} | `string` | n/a | yes |
+| <a name="input_user_host"></a> [user\_host](#input\_user\_host) | The host the user can connect from. This is only supported for MySQL instances. Don't set this field for PostgreSQL instances. Can be an IP address, or % to allow any host. Changing this forces a new resource to be created. | `string` | `null` | no |
+| <a name="input_user_name"></a> [user\_name](#input\_user\_name) | User name. | `string` | n/a | yes |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| <a name="output_connection_name"></a> [connection\_name](#output\_connection\_name) | Cloud SQL connection name |
+| <a name="output_database_name"></a> [database\_name](#output\_database\_name) | Cloud SQL Database name |
+| <a name="output_instance_connection_name"></a> [instance\_connection\_name](#output\_instance\_connection\_name) | The connection name of the instance to be used in connection strings. For example, when connecting with Cloud SQL Proxy. |
+| <a name="output_instance_ip_address"></a> [instance\_ip\_address](#output\_instance\_ip\_address) | The IPv4 address assigned to the database instance. |
+| <a name="output_instance_ip_address_type"></a> [instance\_ip\_address\_type](#output\_instance\_ip\_address\_type) | The type of IP address assigned to this instance. { PRIMARY \| OUTGOING \| PRIVATE }. This module handles with PRIVATE only |
+| <a name="output_instance_name"></a> [instance\_name](#output\_instance\_name) | Cloud SQL Database instance name |
+| <a name="output_secret_manager_cloudsql_client_cert_secret_id"></a> [secret\_manager\_cloudsql\_client\_cert\_secret\_id](#output\_secret\_manager\_cloudsql\_client\_cert\_secret\_id) | Secret manager id path where the CloudSQL client certificate secret is stored |
+| <a name="output_secret_manager_cloudsql_user_secret_id"></a> [secret\_manager\_cloudsql\_user\_secret\_id](#output\_secret\_manager\_cloudsql\_user\_secret\_id) | Secret manager id where the CloudSQL user name/password secret is stored |
+<!-- END_TF_DOCS -->
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diff --git a/main.tf b/main.tf
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+resource "google_sql_database_instance" "cloudsql_instance" {
+  name             = var.instance_name
+  region           = var.region
+  database_version = var.database_version
+
+  # settings section is optional unless clone is not set. We do not implement clone but insted we create a new instance. 
+  # Thus, settings becomes mandatory in this implementation
+  # Some of the settigs set are the same as terraform default values but explicitly set
+  settings {
+    tier            = var.tier
+    disk_autoresize = var.disk_autoresize
+    disk_type       = var.disk_type
+
+    # (backup_configuration is optional)
+    dynamic "backup_configuration" {
+      for_each = var.backup_configuration
+
+      content {
+        enabled    = backup_configuration.value.enabled
+        start_time = backup_configuration.value.start_time
+        location   = backup_configuration.value.location
+        backup_retention_settings {
+          retained_backups = backup_configuration.value.retained_backups
+          # retention_unit = "COUNT"
+        }
+      }
+    }
+
+    ip_configuration {
+      # should this cloud sql get assigned a public ip ?
+      ipv4_enabled = var.public_ip
+      # VPC network from which cloudsql instance is accessible for private IP.
+      private_network = var.network
+      require_ssl     = var.require_ssl
+
+      # Authorized networks can be configured if:
+      # - client application is connecting directly to a Cloud SQL instance on its public IP address
+      # - client application is connecting directly to a Cloud SQL instance on its private IP address, 
+      #   and your client's IP address is a non-RFC 1918 address
+      # ref: # https://cloud.google.com/sql/docs/mysql/authorize-networks
+      #
+      # Limitations: addresses that cannot be added as authorized networks
+      # RFC1918 private addresses (THEY ARE AUTOMATICALLY INCLUDED), 
+      # RFC1122 Loopback,  172.17/16 docker bridge nw,
+      # RFC3330 null network, RFC3927/2373 link-local, RFC3330/3849 documentation nw,
+      # RFC3330 multicast networks, class-E address space (RFC1112)
+      #   
+      # (authorized_networks is optional)
+      dynamic "authorized_networks" {
+        for_each = var.authorized_cidrs
+        iterator = ntw
+
+        content {
+          name  = ntw.key
+          value = ntw.value
+        }
+      }
+    }
+
+    # maintenance window (for updates and needed restarts) - Time: UTC, Day: 1-7 (1==Monday,...)
+    # By default it does maintenance window any time, any day.
+    # (maintenance_window is optional)
+    dynamic "maintenance_window" {
+      for_each = var.maintenance_window
+      iterator = window
+      content {
+        day          = window.value.day
+        hour         = window.value.hour
+        update_track = window.value.update_track
+      }
+    }
+
+  }
+
+  deletion_protection = var.deletion_protection
+}
+
+### User 
+
+# Password - provide a strong password unless password already provided via variable
+
+# Provide a "Strong" password
+# https://dev.mysql.com/doc/refman/8.0/en/validate-password.html
+# Note that Password Policy STRONG => lenght>8, 1 numeric + 1 lowercase + 1 uppercase + 1 special, substring of len>=4 are not dictionary words
+resource "random_password" "cloudsql_user_password" {
+  length           = 20
+  special          = true
+  min_lower        = 2
+  min_upper        = 2
+  min_numeric      = 2
+  min_special      = 2
+  override_special = "_%@$#"
+}
+
+resource "google_sql_user" "cloudsql_user" {
+  name     = var.user_name
+  instance = google_sql_database_instance.cloudsql_instance.name
+  password = sensitive(random_password.cloudsql_user_password.result)
+  host     = var.user_host
+}
+
+### Database
+resource "google_sql_database" "cloudsql_database" {
+  name     = var.db_name
+  instance = google_sql_database_instance.cloudsql_instance.name
+}
+
+### Certificate
+resource "google_sql_ssl_cert" "client_cert" {
+  common_name = var.cert_common_name
+  instance    = google_sql_database_instance.cloudsql_instance.name
+}
+
+### TODO: Secret manager
+resource "google_secret_manager_secret" "registry_sql_user_password" {
+  provider = google-beta
+  secret_id = "${var.instance_name}_sql_user_password"
+
+  replication {
+    user_managed {
+      replicas {
+        location = var.region
+      }
+    }
+  }
+}
+
+resource "google_secret_manager_secret_version" "secret-version-basic" {
+  provider = google-beta
+  secret = google_secret_manager_secret.registry_sql_user_password.id
+
+  secret_data = sensitive(
+    jsonencode(
+      {
+        "cloudsql_instance_name" = google_sql_user.cloudsql_user.instance
+        "cloudsql_user_name"     = google_sql_user.cloudsql_user.name
+        "cloudsql_user_password" = random_password.cloudsql_user_password.result
+      }
+    )
+  )
+}
+
+resource "google_secret_manager_secret" "registry_sql_client_cert" {
+  provider = google-beta
+  secret_id = "${var.instance_name}_sql_client_cert"
+
+  replication {
+    user_managed {
+      replicas {
+        location = var.region
+      }
+    }
+  }
+}
+
+resource "google_secret_manager_secret_version" "registry_sql_client_cert" {
+  provider = google-beta
+  secret = google_secret_manager_secret.registry_sql_client_cert.id
+
+  secret_data = sensitive(
+    jsonencode(
+      {
+        "cert"           = base64encode(google_sql_ssl_cert.client_cert.cert)
+        "private_key"    = base64encode(google_sql_ssl_cert.client_cert.private_key)
+        "server_ca_cert" = base64encode(google_sql_ssl_cert.client_cert.server_ca_cert)
+      }
+    )
+  )
+}
diff --git a/outputs.tf b/outputs.tf
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+
+output "instance_name" {
+  value       = google_sql_database_instance.cloudsql_instance.name
+  description = "Cloud SQL Database instance name"
+}
+
+output "instance_connection_name" {
+  value       = google_sql_database_instance.cloudsql_instance.connection_name
+  description = "The connection name of the instance to be used in connection strings. For example, when connecting with Cloud SQL Proxy."
+}
+
+output "instance_ip_address" {
+  value       = google_sql_database_instance.cloudsql_instance.ip_address
+  description = "The IPv4 address assigned to the database instance."
+}
+
+output "instance_ip_address_type" {
+  value       = google_sql_database_instance.cloudsql_instance.ip_address[0].type
+  description = "The type of IP address assigned to this instance. { PRIMARY | OUTGOING | PRIVATE }. This module handles with PRIVATE only"
+}
+
+output "database_name" {
+  value       = google_sql_database.cloudsql_database.name
+  description = "Cloud SQL Database name"
+}
+
+output "connection_name" {
+  value       = google_sql_database_instance.cloudsql_instance.connection_name
+  description = "Cloud SQL connection name"
+}
+
+output "secret_manager_cloudsql_user_secret_id" {
+  value       = google_secret_manager_secret.registry_sql_user_password.secret_id
+  description = "Secret manager id where the CloudSQL user name/password secret is stored"
+}
+
+output "secret_manager_cloudsql_client_cert_secret_id" {
+  value       = google_secret_manager_secret.registry_sql_client_cert.secret_id
+  description = "Secret manager id path where the CloudSQL client certificate secret is stored"
+}
\ No newline at end of file
diff --git a/variables.tf b/variables.tf
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+
+###############################################################
+# Default variables                                           #
+###############################################################
+
+##### GCP PROJECT
+#
+# variable "project_id" {
+#   type        = string
+#   description = "The project ID to host resources."
+# }
+
+variable "region" {
+  type        = string
+  description = "The region to host the resources in."
+  default     = "europe-west1"
+}
+
+###### Cloud SQL
+
+# Cloud SQL configuration
+# {Instance settings documentation} [https://cloud.google.com/sql/docs/<mysq|postgres|sqlserver>/instance-settings]
+# {Instance locations documentation} [https://cloud.google.com/sql/docs/<mysql|postgres|sqlserver>/locations]
+
+
+variable "instance_name" {
+  type        = string
+  description = "Full name of the SQL instance."
+}
+
+variable "db_name" {
+  type        = string
+  description = "Full name of the SQL database."
+}
+
+variable "cert_common_name" {
+  type        = string
+  description = "Certificate Common Name."
+}
+
+variable "user_name" {
+  type        = string
+  description = "User name."
+}
+
+variable "user_host" {
+  type        = string
+  description = "The host the user can connect from. This is only supported for MySQL instances. Don't set this field for PostgreSQL instances. Can be an IP address, or % to allow any host. Changing this forces a new resource to be created."
+  default     = null
+}
+
+### Other parameters
+
+variable "deletion_protection" {
+  type        = bool
+  description = "If set to true, you protect an instance from being deleted."
+  default     = true
+}
+
+# Settings 
+
+variable "database_version" {
+  type        = string
+  description = "Database type and version. Supported values = {MYSQL_5_6, MYSQL_5_7, MYSQL_8_0, POSTGRES_9_6,POSTGRES_10, POSTGRES_11, POSTGRES_12, POSTGRES_13, ...}. See {Instance settings documentation}"
+}
+
+variable "tier" {
+  type        = string
+  description = "CloudSQL instance machine type (service tier). See {Instance settings documentation}"
+}
+
+variable "disk_autoresize" {
+  type        = bool
+  description = "Whether if the disk can grow when more space is needed. If disk_autoresize=true do not set disk_size as terraform apply would try to set the disk_size"
+  default     = true
+}
+
+variable "disk_type" {
+  type        = string
+  description = "Type of disk used on the CloudSQL instance VM"
+  default     = "PD_SSD"
+}
+
+# IP configuration 
+# Note that we do not allow the usage of public_ip but instead ise a private_network to 
+# reach the CloudSQL instance 
+
+variable "public_ip" {
+  type        = bool
+  description = "assign a public IP to this CloudSQL instance. Attention: you need Security approval to give a public IP to your CloudSQL instance."
+  default     = false
+} 
+
+variable "network" {
+  type        = string
+  description = "Self link of the VPC network"
+}
+
+variable "require_ssl" {
+  type        = bool
+  description = "If require SSL, the connection port will be 3307, otherwise 3306."
+  default     = true
+}
+
+variable "authorized_cidrs" {
+  type        = map(string)
+  description = "Authorized networks CIDRs to connect to Cloud SQL instance."
+  default     = {}
+}
+
+# Backup
+variable "backup_configuration" {
+  description = "The backup_configuration subblock for the database setings"
+  type = list(object({
+    enabled          = bool
+    start_time       = string
+    location         = string
+    retained_backups = number
+  }))
+  default = []
+}
+
+# OS updates
+variable "maintenance_window" {
+  description = "Maintenance window to update/patch the VM. It can be rebooted during this maintenance window"
+  type = list(object({
+    day          = number
+    hour         = number
+    update_track = string
+  }))
+  default = []
+}
+
+
+###############################################################
+# Custom variables                                            #
+###############################################################
+
+# Add here some custom / additional variables
+
+variable "module_depends_on" {
+  type    = any
+  default = null
+}
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diff --git a/versions.tf b/versions.tf
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+terraform {
+  required_version = ">=0.15"
+
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = ">= 3.89.0"
+    }
+    # For CloudSQL
+    random = {
+      source  = "hashicorp/random"
+      version = ">= 3.1.0"
+    }
+
+    vault = {
+      source  = "hashicorp/vault"
+      version = ">= 2.17.0"
+    }
+  }
+}