add users.lookupByEmail endpoint

src/Payload/UsersLookupByEmailPayload.php

@@ -0,0 +1,36 @@
+<?php
+/**
+ * @author  nediam
+ * @date    2019-06-12 22:05
+ */
+
+declare(strict_types=1);
+
+namespace CL\Slack\Payload;
+
+
+class UsersLookupByEmailPayload extends AbstractPayload
+{
+    /** @var string */
+    private $email;
+
+    public function getEmail()
+    {
+        return $this->email;
+    }
+
+    public function setEmail($email)
+    {
+        $this->email = $email;
+
+        return $this;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getMethod()
+    {
+        return 'users.lookupByEmail';
+    }
+}

src/Payload/UsersLookupByEmailPayloadResponse.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * @author  nediam
+ * @date    2019-06-12 22:05
+ */
+
+declare(strict_types=1);
+
+namespace CL\Slack\Payload;
+
+
+class UsersLookupByEmailPayloadResponse extends AbstractPayloadResponse
+{
+    /**
+     * @var User|null
+     */
+    private $user;
+
+    /**
+     * @return User|null
+     */
+    public function getUser()
+    {
+        return $this->user;
+    }
+}

src/Resources/config/serializer/CL.Slack.Payload.UsersLookupByEmailPayload.yml

@@ -0,0 +1,4 @@
+CL\Slack\Payload\UsersLookupByEmailPayload:
+    properties:
+        email:
+            type: string

src/Resources/config/serializer/CL.Slack.Payload.UsersLookupByEmailPayloadResponse.yml

@@ -0,0 +1,4 @@
+CL\Slack\Payload\UsersLookupByEmailPayloadResponse:
+    properties:
+        user:
+            type: CL\Slack\Model\User