google-calendar: Fix usage of term "credentials", replace with "tokens".

Replaces some occurrences of the term "credentials" with "tokens" for
clarity, to conform with the terms used in Google API documentation.

Renamed:
- "google-credentials.json" to "google-tokens.json"
- `credential_path` to `tokens_path`

Google documentation refers to the client secret file sometimes as
"credentials.json", and the tokens file as "tokens.json".
We have been using "client-secret.json" and "google-credentials.json"
respectively, which can be confusing.

So, this commit switches to using the term "tokens" instead of
"credentials" wherever appropriate, to avoid confusion.
The term "credentials" is still used to refer to the Credentials object
returned after authorization.

Author: Niloth-p

zulip/integrations/google/get-google-credentials

@@ -8,7 +8,7 @@ from google_auth_oauthlib.flow import InstalledAppFlow
 SCOPES = ["https://www.googleapis.com/auth/calendar.events.readonly"]
 # File containing user's access and refresh tokens for Google application requests.
 # If it does not exist, e.g., first run, it is generated on user authorization.
-TOKENS_FILE = "google-credentials.json"
+TOKENS_FILE = "google-tokens.json"
 # This file contains the information that google uses to figure out which application is requesting
 # this client's data.
 CLIENT_SECRET_FILE = "client_secret.json"  # noqa: S105
@@ -32,10 +32,10 @@ def get_credentials() -> Credentials:
     """
 
     creds = None
-    credential_path = os.path.join(HOME_DIR, TOKENS_FILE)
+    tokens_path = os.path.join(HOME_DIR, TOKENS_FILE)
 
-    if os.path.exists(credential_path):
-        creds = Credentials.from_authorized_user_file(credential_path, SCOPES)
+    if os.path.exists(tokens_path):
+        creds = Credentials.from_authorized_user_file(tokens_path, SCOPES)
     if not creds or not creds.valid:
         if creds and creds.expired and creds.refresh_token:
             creds.refresh(Request())
@@ -44,7 +44,7 @@ def get_credentials() -> Credentials:
                 os.path.join(HOME_DIR, CLIENT_SECRET_FILE), SCOPES
             )
             creds = flow.run_local_server(port=0)
-        with open(credential_path, "w") as token:
+        with open(tokens_path, "w") as token:
             token.write(creds.to_json())
     return creds
 

zulip/integrations/google/google-calendar

@@ -24,7 +24,7 @@ import zulip
 SCOPES = ["https://www.googleapis.com/auth/calendar.events.readonly"]
 # File containing user's access and refresh tokens for Google application requests.
 # If it does not exist, e.g., first run, it is generated on user authorization.
-TOKENS_FILE = "google-credentials.json"
+TOKENS_FILE = "google-tokens.json"
 CLIENT_SECRET_FILE = "client_secret.json"  # noqa: S105
 HOME_DIR = os.path.expanduser("~")
 
@@ -96,8 +96,8 @@ def get_credentials() -> Credentials:
         Credentials, the obtained credential.
     """
     try:
-        credential_path = os.path.join(HOME_DIR, TOKENS_FILE)
-        return Credentials.from_authorized_user_file(credential_path, SCOPES)
+        tokens_path = os.path.join(HOME_DIR, TOKENS_FILE)
+        return Credentials.from_authorized_user_file(tokens_path, SCOPES)
     except ValueError:
         logging.exception("Error while trying to open the %s file.", TOKENS_FILE)
         sys.exit(1)