updated the authentication get return type and included test

src/Authentication.php

@@ -38,7 +38,7 @@ public function __construct(InspiredDeckAuth $authResource = null)
      *
      * @return mixed
      */
-    public function get(): array
+    public function get()
     {
         return Session::get($this->sessionKey, false);
     }

src/InspiredDeckAuth.php

@@ -6,9 +6,7 @@ interface InspiredDeckAuth
 {
 
     /**
-     * Get the currently Authenticated User
-     *
      * @return mixed
      */
-    public function get(): array;
+    public function get();
 }

tests/Unit/AuthenticationTest.php

@@ -36,6 +36,14 @@ public function can_authenticate(): void
         $this->assertTrue($response);
     }
 
+    /** @test **/
+    public function check_that_authentication_can_return_false(): void
+    {
+        $authentication = new Authentication();
+
+        $this->assertFalse($authentication->get());
+    }
+
     /** @test **/
     public function login_stores_authentication_in_session(): void
     {