diff --git a/src/ResponseTypes/AuthorizeClientResponseTypeInterface.php b/src/ResponseTypes/AuthorizeClientResponseTypeInterface.php
new file mode 100644
index 00000000..188a0332
--- /dev/null
+++ b/src/ResponseTypes/AuthorizeClientResponseTypeInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace League\OAuth2\Server\ResponseTypes;
+
+use League\OAuth2\Server\Entities\Interfaces\ClientEntityInterface;
+use League\OAuth2\Server\Entities\Interfaces\ScopeEntityInterface;
+
+interface AuthorizeClientResponseTypeInterface
+{
+    /**
+     * Return a login form
+     *
+     *
+     * @param \League\OAuth2\Server\Entities\Interfaces\ClientEntityInterface $client
+     * @param ScopeEntityInterface[]                                          $scopes
+     * @param string                                                          $queryString
+     * @param string                                                          $pathToPrivateKey
+     *
+     * @return \Psr\Http\Message\ResponseInterface
+     */
+    public function handle(ClientEntityInterface $client, array $scopes, $queryString, $pathToPrivateKey);
+}
\ No newline at end of file
diff --git a/src/ResponseTypes/LoginUserResponseTypeInterface.php b/src/ResponseTypes/LoginUserResponseTypeInterface.php
new file mode 100644
index 00000000..25b8dfa5
--- /dev/null
+++ b/src/ResponseTypes/LoginUserResponseTypeInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace League\OAuth2\Server\ResponseTypes;
+
+use League\OAuth2\Server\Entities\Interfaces\ClientEntityInterface;
+use League\OAuth2\Server\Entities\Interfaces\ScopeEntityInterface;
+
+interface LoginUserResponseTypeInterface
+{
+    /**
+     * Return a login form
+     *
+     *
+     * @param \League\OAuth2\Server\Entities\Interfaces\ClientEntityInterface $client
+     * @param ScopeEntityInterface[]                                          $scopes
+     * @param string                                                          $queryString
+     * @param string                                                          $pathToPrivateKey
+     *
+     * @return \Psr\Http\Message\ResponseInterface
+     */
+    public function handle(ClientEntityInterface $client, array $scopes, $queryString, $pathToPrivateKey);
+}
\ No newline at end of file