Add possibility to enter password in PostgreSQLDatabaseConfig

Sources/PostgreSQL/Database/PostgreSQLDatabase.swift

@@ -18,7 +18,11 @@ public final class PostgreSQLDatabase: Database {
         do {
             let client = try PostgreSQLConnection.connect(hostname: config.hostname, port: config.port, on: worker)
             client.logger = logger
-            return client.authenticate(username: config.username).transform(to: client)
+            return client.authenticate(
+                username: config.username, 
+                database: config.database,
+                password: config.password
+            ).transform(to: client)
         } catch {
             return Future(error: error)
         }

Sources/PostgreSQL/Database/PostgreSQLDatabaseConfig.swift

@@ -13,11 +13,20 @@ public struct PostgreSQLDatabaseConfig {
 
     /// Username to authenticate.
     public let username: String
-
+
+    /// Optional database name to use during authentication.
+    /// Defaults to the username.
+    public let database: String?
+
+    /// Optional password to use for authentication.
+    public let password: String?
+
     /// Creates a new `PostgreSQLDatabaseConfig`.
-    public init(hostname: String, port: UInt16, username: String) {
+    public init(hostname: String, port: UInt16, username: String, database: String? = nil, password: String? = nil) {
         self.hostname = hostname
         self.port = port
         self.username = username
+        self.database = database
+        self.password = password
     }
 }