Adding trigger condition to Animator transition through code? - uses parameter which is not compatible with condition type

I have an Editor script that is able to add conditions to state transitions, and it works fine, unless I try to add a Trigger condition.

I use the code:

 transition.AddCondition(AnimatorConditionMode.Equals, 0, "continue");

but I get an error saying:

 Controller 'Default': Transition '' in state 'Assign Role' uses parameter 'continue' which is not compatible with condition type.
 

I understand that the the error lies in the fact that triggers must not necessarily use an AnimatorConditionMode? However, I've tried other AnimatorConditionModes and can't seem to figure how to work around it. I was surprised to not find other threads on this specific issue.

Anyone know how to work around this?