how to pass custom parameters to a locust test class?

You could use like env <parameter>=<value> locust <options> and use <parameter> inside the locust script to use its value E.g., env IP_ADDRESS=100.0.1.1 locust -f locust-file.py –no-web –clients=5 –hatch-rate=1 –num-request=500 and use IP_ADDRESS inside the locust script to access its value which is 100.0.1.1 in this case.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)