Ask for the old password in order to change it

src/Password.js

@@ -8,6 +8,7 @@ class OwnPassword extends React.Component {
   constructor(props) {
     super(props);
     this.state = {
+      oldPassword: "",
       newPassword: "",
       newPassword2: "",
       formErrors: "",
@@ -34,6 +35,8 @@ class OwnPassword extends React.Component {
 
     this.setState(
       {
+        error: null,
+        passwordChanged: null,
         formErrors: formErrors,
         isNewPasswordValid: isNewPasswordValid,
         isNewPassword2Valid: isNewPassword2Valid,
@@ -55,6 +58,7 @@ class OwnPassword extends React.Component {
 
     this.setState({ isLoading: true, error: null });
     const body = JSON.stringify({
+      old_password: this.state.oldPassword,
       password: this.state.newPassword,
     });
     fetch("/api/member/me", {
@@ -92,7 +96,7 @@ class OwnPassword extends React.Component {
     if (this.state.error) {
       alert = (
         <Alert variant="danger">
-          Se produjo un error al intentar cambiar la contraseña:{" "}
+          Se produjo un error al intentar cambiar la contraseña:
           {this.state.error}
         </Alert>
       );
@@ -102,7 +106,6 @@ class OwnPassword extends React.Component {
       alert = (
         <Alert variant="success">La contraseña se ha cambiado con éxito.</Alert>
       );
-      this.state.passwordChanged = false;
     }
 
     return (
@@ -112,6 +115,21 @@ class OwnPassword extends React.Component {
         {alert}
 
         <Form onSubmit={this.handleSubmit}>
+          <Form.Group as={Row}>
+            <Form.Label as="legend" column sm={4}>
+              Contraseña actual
+            </Form.Label>
+            <Col sm={8}>
+              <Form.Control
+                placeholder="Contraseña actual"
+                type="password"
+                onChange={(e) =>
+                  this.setState({ oldPassword: e.target.value })
+                }
+              />
+            </Col>
+          </Form.Group>
+
           <Form.Group as={Row}>
             <Form.Label as="legend" column sm={4}>
               Nueva contraseña