feat: add "forget password" [front & backend] (#75)

* feat: add "forget password" [front & backend]

Signed-off-by: Weihao <1340908470@qq.com>

* fix: verification code can be sent even if no mobile phone or email is selected
refactor: forgetPassword -> forget; GetEmailAndPhoneByUsername -> GetEmailAndPhone; remove useless note

Signed-off-by: Weihao <1340908470@qq.com>

web/src/auth/SelfForgetPage.js

@@ -0,0 +1,32 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import React from "react";
+import { authConfig } from "./Auth";
+import ForgetPage from "./ForgetPage";
+
+class SelfForgetPage extends React.Component {
+  render() {
+    return (
+      <ForgetPage
+        type={"forgotPassword"}
+        applicationName={authConfig.appName}
+        account={this.props.account}
+        {...this.props}
+      />
+    );
+  }
+}
+
+export default SelfForgetPage;