feat: add user_agent to client (#25)

Author: jackwotherspoon

pyproject.toml

@@ -8,7 +8,7 @@ requires-python = ">=3.8"
 dependencies = [
     "langchain==0.1.1",
     "SQLAlchemy==2.0.7",
-    "cloud-sql-python-connector[pymysql]==1.5.0"
+    "cloud-sql-python-connector[pymysql]==1.7.0"
 ]
 
 [tool.setuptools.dynamic]

src/langchain_google_cloud_sql_mysql/mysql_engine.py

@@ -23,10 +23,14 @@
 import sqlalchemy
 from google.cloud.sql.connector import Connector
 
+from .version import __version__
+
 if TYPE_CHECKING:
     import google.auth.credentials
     import pymysql
 
+USER_AGENT = "langchain-google-cloud-sql-mysql-python/" + __version__
+
 
 def _get_iam_principal_email(
     credentials: google.auth.credentials.Credentials,
@@ -174,7 +178,7 @@ def _create_connector_engine(
             enable_iam_auth = True
 
         if cls._connector is None:
-            cls._connector = Connector()
+            cls._connector = Connector(user_agent=USER_AGENT)
 
         # anonymous function to be used for SQLAlchemy 'creator' argument
         def getconn() -> pymysql.Connection:

src/langchain_google_cloud_sql_mysql/version.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "0.1.0"
+__version__ = "0.0.1"