utils: remove admin access token validation

Remove admin access token validation from some users-related utilities,
as these checks are already performed by the admin CLI.

reana_server/reana_admin/cli.py

@@ -125,7 +125,7 @@ def users_create_default(email, password, id_):
 def list_users(ctx, id, email, user_access_token, admin_access_token, output_format):
     """List users according to the search criteria."""
     try:
-        response = _get_users(id, email, user_access_token, admin_access_token)
+        response = _get_users(id, email, user_access_token)
         headers = ["id", "email", "access_token", "access_token_status"]
         data = []
         for user in response:
@@ -170,7 +170,7 @@ def list_users(ctx, id, email, user_access_token, admin_access_token, output_for
 def create_user(ctx, email, user_access_token, admin_access_token):
     """Create a new user. Requires the token of an administrator."""
     try:
-        response = _create_user(email, user_access_token, admin_access_token)
+        response = _create_user(email, user_access_token)
         headers = ["id", "email", "access_token"]
         data = [(str(response.id_), response.email, response.access_token)]
         click.echo(click.style("User was successfully created.", fg="green"))
@@ -191,7 +191,7 @@ def create_user(ctx, email, user_access_token, admin_access_token):
 def export_users(ctx, admin_access_token):
     """Export all users in current REANA cluster."""
     try:
-        csv_file = _export_users(admin_access_token)
+        csv_file = _export_users()
         click.echo(csv_file.getvalue(), nl=False)
     except Exception as e:
         click.secho(
@@ -214,7 +214,7 @@ def export_users(ctx, admin_access_token):
 def import_users(ctx, admin_access_token, file_):
     """Import users from file."""
     try:
-        _import_users(admin_access_token, file_)
+        _import_users(file_)
         click.secho("Users successfully imported.", fg="green")
     except Exception as e:
         click.secho(
@@ -459,7 +459,7 @@ def list_quota_usage(
 ):
     """List quota usage of users."""
     try:
-        response = _get_users(id, email, user_access_token, admin_access_token)
+        response = _get_users(id, email, user_access_token)
         headers = ["id", "email", "cpu-used", "cpu-limit", "disk-used", "disk-limit"]
         health_order = {
             QuotaHealth.healthy.name: 0,

reana_server/utils.py

@@ -295,9 +295,8 @@ def _validate_admin_access_token(admin_access_token: str):
         raise ValueError("Admin access token invalid.")
 
 
-def _get_users(_id, email, user_access_token, admin_access_token):
+def _get_users(_id, email, user_access_token):
     """Return all users matching search criteria."""
-    _validate_admin_access_token(admin_access_token)
     search_criteria = dict()
     if _id:
         search_criteria["id_"] = _id
@@ -311,10 +310,9 @@ def _get_users(_id, email, user_access_token, admin_access_token):
     return query.all()
 
 
-def _create_user(email, user_access_token, admin_access_token):
+def _create_user(email, user_access_token):
     """Create user with provided credentials."""
     try:
-        _validate_admin_access_token(admin_access_token)
         if not user_access_token:
             user_access_token = secrets.token_urlsafe(16)
         user_parameters = dict(access_token=user_access_token)
@@ -328,13 +326,12 @@ def _create_user(email, user_access_token, admin_access_token):
     return user
 
 
-def _export_users(admin_access_token):
+def _export_users():
     """Export all users in database as csv.
 
     :param admin_access_token: Admin access token.
     :type admin_access_token: str
     """
-    _validate_admin_access_token(admin_access_token)
     csv_file_obj = io.StringIO()
     csv_writer = csv.writer(csv_file_obj, dialect="unix")
     for user in User.query.all():
@@ -344,15 +341,14 @@ def _export_users(admin_access_token):
     return csv_file_obj
 
 
-def _import_users(admin_access_token, users_csv_file):
+def _import_users(users_csv_file):
     """Import list of users to database.
 
     :param admin_access_token: Admin access token.
     :type admin_access_token: str
     :param users_csv_file: CSV file object containing a list of users.
     :type users_csv_file: _io.TextIOWrapper
     """
-    _validate_admin_access_token(admin_access_token)
     csv_reader = csv.reader(users_csv_file)
     for row in csv_reader:
         user = User(