feat: add email and password change functionality

commit f1b7f2b
Author: Asif Arman Rahman <asifarmanrahman@gmail.com>
Date:   Sun Aug 20 19:26:29 2023 +0600

    docs(auth): guide update

    * change_email
    * change_password

commit 31df27d
Author: Vladislav Dashtu <ladpost@mail.ru>
Date:   Tue Aug 15 22:47:43 2023 +0400

    mistake in change_email description

commit 44092c2
Author: Vladislav Dashtu <ladpost@mail.ru>
Date:   Tue Aug 15 22:43:12 2023 +0400

    added change_email and change_password methods

resolves #20

docs/guide/authentication.rst

@@ -291,6 +291,32 @@ Update stored information or add information into the user's account.
 ..
 
 
+change_email
+--------------
+
+Change the email associated with the user's account.
+
+.. code-block:: python
+
+   # change user's email
+   auth.change_email(user['idToken'], email='iam@ironman.com')
+
+..
+
+
+change_password
+--------------
+
+Change the password associated with the user's account.
+
+.. code-block:: python
+
+   # change user's password
+   auth.change_password(user['idToken'], password='iLoveYou3000')
+
+..
+
+
 refresh
 -------
 

firebase/auth/__init__.py

@@ -521,6 +521,62 @@ def _token_from_auth_url(self, url):
 			'type': 'id_token',
 			'value': request_object.json()['id_token'],
 		}
+
+	def change_email(self, id_token, email):
+		""" Changes a user's email
+
+		| For more details:
+		| `Firebase Auth REST API | section-change-email`_
+
+		.. _Firebase Auth REST API | section-change-email: https://firebase.google.com/docs/reference/rest/auth#section-change-email
+
+		:type id_token: str
+		:param id_token: A Firebase Auth ID token for the user.
+
+		:type email: str
+		:param email: User's new email.
+
+		:return: UserInfo and Firebase Auth Tokens.
+		:rtype: dict
+		"""
+
+		request_ref = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/setAccountInfo?key={0}".format(self.api_key)
+
+		headers = {"content-type": "application/json; charset=UTF-8"}
+		data = json.dumps({"idToken": id_token, "email": email, "returnSecureToken": True})
+		request_object = self.requests.post(request_ref, headers=headers, data=data)
+
+		raise_detailed_error(request_object)
+
+		return request_object.json()
+
+	def change_password(self, id_token, password):
+		""" Changes a user's password
+
+		| For more details:
+		| `Firebase Auth REST API | section-change-password`_
+
+		.. _Firebase Auth REST API | section-change-password: https://firebase.google.com/docs/reference/rest/auth#section-change-password
+
+		:type id_token: str
+		:param id_token: A Firebase Auth ID token for the user.
+
+		:type password: str
+		:param password: User's new password.
+
+		:return: UserInfo and Firebase Auth Tokens.
+		:rtype: dict
+		"""
+
+		request_ref = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/setAccountInfo?key={0}".format(self.api_key)
+
+		headers = {"content-type": "application/json; charset=UTF-8"}
+		data = json.dumps({"idToken": id_token, "password": password, "returnSecureToken": True})
+		request_object = self.requests.post(request_ref, headers=headers, data=data)
+
+		raise_detailed_error(request_object)
+
+		return request_object.json()
 
 	def update_profile(self, id_token, display_name=None, photo_url=None, delete_attribute=None):
 		""" Update a user's profile (display name / photo URL).