I want be able to get token via api. Used for mobile applications

lib/api/session.rb

@@ -0,0 +1,21 @@
+module Gitlab
+  # Users API
+  class Session < Grape::API
+    # Login to get token
+    #
+    # Example Request:
+    #  POST /session
+    post "/session" do
+      resource = User.find_for_database_authentication(email: params[:email])
+
+      return forbidden! unless resource
+
+      if resource.valid_password?(params[:password])
+        present resource, with: Entities::UserLogin
+      else
+        forbidden!
+      end
+    end
+  end
+end
+