Authentication failure for user in connecting to GCP posrgreSQL cloud SQL via cloud sql proxy and using sqlalchemy in python on Ubuntu machine - python-3.x

Question

I have crated a postgreSQL cloud SQL instance in GCP and I have created a user and a DB for it. I can connect to it via cloud_sql_proxy tool:
$ cloud_sql_proxy -instances=project_name:REGION:instance_name=tcp:5432 -credential_file=/path/to/key.json
I then can successfully connect to instance via psql and run queries and insert data etc in command line:
$ psql "host=127.0.0.1 port=5432 sslmode=disable dbname=myDBname user=myUser"
Password:
psql (10.18 (Ubuntu 10.18-0ubuntu0.18.04.1), server 13.3)
WARNING: psql major version 10, server major version 13.
Some psql features might not work.
Type "help" for help.
myDBname=>SELECT * FROM MyTable;
My issue is that when I try to use the sqlalchemy library and use the sample code provided in sqlalchemy example code like this:
import sqlalchemy
import os
db_config = {
"pool_size": 5,
"max_overflow": 2,
"pool_timeout": 30, # 30 seconds
"pool_recycle": 1800, # 30 minutes
}
def init_tcp_connection_engine(db_config):
db_user = "myUser"
db_pass = "myPassword"
db_name = "myDBname"
db_hostname = "127.0.0.1"
db_port = 5432
pool = sqlalchemy.create_engine(
# Equivalent URL:
# postgresql+pg8000://<db_user>:<db_pass>#<db_host>:<db_port>/<db_name>
sqlalchemy.engine.url.URL.create(
drivername="postgresql+pg8000",
username=db_user, # e.g. "my-database-user"
password=db_pass, # e.g. "my-database-password"
host=db_hostname, # e.g. "127.0.0.1"
port=db_port, # e.g. 5432
database=db_name # e.g. "my-database-name"
),
**db_config
)
# [END cloud_sql_postgres_sqlalchemy_create_tcp]
pool.dialect.description_encoding = None
return pool
def main():
db = init_tcp_connection_engine(db_config)
with db.connect() as conn:
rows = conn.execute("SELECT * FROM MyTable;").fetchall()
for row in rows:
print(row)
if __name__ == "__main__":
main()
I get the error of
Exception has occurred: ProgrammingError (note: full exception trace is shown but execution is paused at: <module>)
(pg8000.dbapi.ProgrammingError) {'S': 'FATAL', 'V': 'FATAL', 'C': '28P01', 'M': 'password authentication failed for user "myUser"', 'F': 'auth.c', 'L': '347', 'R': 'auth_failed'}
(Background on this error at: https://sqlalche.me/e/14/f405)
Any idea what is wrong and how I can resolve this?

Answer 1

I changed the password via webUI and then paste it into code and it worked.