[Python] Connect to IBM DB2 database using SQLAlchemy

I am trying to connect to a cloud based IBM DB2 database using SQLAlchemy. Using the base ibm_db python library this works :

connection_string = 'DRIVER={DB2};DATABASE=BLUDB;HOSTNAME=host.databases.appdomain.cloud;PORT=port;PROTOCOL=TCPIP;UID=user;PWD=pass;SECURITY=SSL;'
conn = ibm_db.connect(connection_string, '', '')


However, trying to do the same using SQLAlchemy, the connect part just hangs/timeouts

from sqlalchemy import create_engine
import ibm_db_sa

user = "user"
password = "pass"
host = "host.databases.appdomain.cloud"
port = "port"
database = "BLUDB"

db2_connection_string = (
f'db2+ibm_db://{user}:{password}@{host}:{port}/{database}'
':SECURITY=SSL'
)

engine = create_engine(db2_connection_string)
connection = engine.connect() # timeouts here


Any suggestions ?

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