diff --git a/Sources/CumulocityCoreLibrary/Supplementary/AdaptableApi.swift b/Sources/CumulocityCoreLibrary/Supplementary/AdaptableApi.swift
index adc7600..8291c43 100644
--- a/Sources/CumulocityCoreLibrary/Supplementary/AdaptableApi.swift
+++ b/Sources/CumulocityCoreLibrary/Supplementary/AdaptableApi.swift
@@ -13,7 +13,7 @@ public class AdaptableApi {
     let requestBuilder: URLRequestBuilder
     let session: URLSession
 
-	public init(requestBuilder: URLRequestBuilder = URLRequestBuilder(), withSession session: URLSession = URLSession.shared) {
+	public init(requestBuilder: URLRequestBuilder = URLRequestBuilder(), withSession session: URLSession = Cumulocity.Core.shared.session) {
 		self.requestBuilder = requestBuilder
  		self.session = session
 	}
diff --git a/Sources/CumulocityCoreLibrary/Supplementary/URLRequestBuilder.swift b/Sources/CumulocityCoreLibrary/Supplementary/URLRequestBuilder.swift
index e2df668..20c7c63 100644
--- a/Sources/CumulocityCoreLibrary/Supplementary/URLRequestBuilder.swift
+++ b/Sources/CumulocityCoreLibrary/Supplementary/URLRequestBuilder.swift
@@ -34,27 +34,32 @@ public class URLRequestBuilder {
 		self.queryItems = with.queryItems
 	}
 
+    @discardableResult
     public func set(scheme: String) -> URLRequestBuilder {
         self.components.scheme = scheme
         return self
     }
 
+    @discardableResult
     public func set(host: String) -> URLRequestBuilder {
         self.components.host = host
         return self
     }
 
+    @discardableResult
     public func set(resourcePath: String) -> URLRequestBuilder {
         self.components.path = resourcePath
         return self
     }
 
+    @discardableResult
     public func set(httpMethod: String) -> URLRequestBuilder {
 		self.httpMethod = httpMethod
 		return self
 	}
 
-	public func add<Subject>(header: String, value: Subject?) -> URLRequestBuilder {
+    @discardableResult
+    public func add<Subject>(header: String, value: Subject?) -> URLRequestBuilder {
         if let v = value {
             let valueAsString = String(describing: v)
             guard !valueAsString.isEmpty else {
@@ -65,8 +70,9 @@ public class URLRequestBuilder {
         return self
     }
 
-	public func set(authorization userName: String, password: String) -> URLRequestBuilder {
-		let credentials = "\(userName):\(password)"
+    @discardableResult
+    public func set(authorization userName: String, password: String) -> URLRequestBuilder {
+        let credentials = "\(userName):\(password)"
 		if let encodedCredentials = credentials.data(using: .utf8) {
 			self.requestHeaders["Authorization"] = "Basic " + encodedCredentials.base64EncodedString()
 		}
@@ -76,7 +82,8 @@ public class URLRequestBuilder {
 	/// Appends a ``URLQueryItem`` based on the passed ``key``/``value`` pair if ``value`` is not nil.
     ///
     /// The parameter will be serialized as `?key=value`.
-	public func add<Subject>(queryItem key: String, value: Subject?) -> URLRequestBuilder {
+    @discardableResult
+    public func add<Subject>(queryItem key: String, value: Subject?) -> URLRequestBuilder {
         if let v = value {
             let valueAsString = String(describing: v)
             guard !valueAsString.isEmpty else {
@@ -92,6 +99,7 @@ public class URLRequestBuilder {
     /// The parameter `explode` defines the serialisation method:
     /// - If `true`, parameter will be serialized as `?key=1&key=2&key=3`.
     /// - If `false`, parameter will be serialized as `?key=1,2,3`.
+    @discardableResult
     public func add<Subject>(queryItem key: String, value: [Subject]?, explode: ParameterSerializationType = .exploded) -> URLRequestBuilder {
         if let v = value {
             if explode == .exploded {
@@ -105,7 +113,8 @@ public class URLRequestBuilder {
         return self
     }
 
-	public func set(httpBody: Data?) -> URLRequestBuilder {
+    @discardableResult
+    public func set(httpBody: Data?) -> URLRequestBuilder {
         self.httpBody = httpBody
         return self
     }