Fix some mistakes

Author: Pseudolukian

examples/static-credentials/example.py

@@ -1,23 +1,5 @@
 import ydb
 
-def load_ydb_ca_cert(path:str) -> str:
-    """Load CA certification.
-
-    Args:
-        path (str): path to CA certification.
-    
-    The function load_ydb_ca_cert accepts a path to a CA certificate 
-    and returns its content as a byte string for further passing to ydb.DriverConfig. 
-    If the specified path is incorrect or the certificate does not exist, 
-    it raises an exception with the message "CA not found".
-
-    """
-    if path is not None and os.path.exists(path):
-        with open(path, "rb") as file:
-            return file.read()
-    else:
-        raise FileNotFoundError("CA not found")
-
 def test_driver_works(driver: ydb.Driver):
     """Tests the functionality of the YDB driver.
 
@@ -34,7 +16,7 @@ def test_driver_works(driver: ydb.Driver):
     result = pool.execute_with_retries("SELECT 1 as cnt")
     assert result[0].rows[0].cnt == 1
 
-def auth_with_static_credentials(endpoint: str, database: str, user: str, password: str):
+def auth_with_static_credentials(endpoint: str, database: str, user: str, password: str, ca_path: str):
     """Authenticate using static credentials.
 
     Args:
@@ -52,7 +34,7 @@ def auth_with_static_credentials(endpoint: str, database: str, user: str, passwo
         endpoint = endpoint,
         database = database,
         credentials = ydb.StaticCredentials.from_user_password(user, password),
-        root_certificates = load_ydb_ca_cert(path = <path_to_ca-cert.crt>)
+        root_certificates = ydb.auth_helpers.load_ydb_root_certificate(ca_path)
     )
 
     with ydb.Driver(driver_config=driver_config) as driver:

ydb/auth_helpers.py

@@ -7,8 +7,7 @@ def read_bytes(f):
         return fr.read()
 
 
-def load_ydb_root_certificate():
-    path = os.getenv("YDB_SSL_ROOT_CERTIFICATES_FILE", None)
+def load_ydb_root_certificate(path:str = None):
     if path is not None and os.path.exists(path):
         return read_bytes(path)
     return None