No module named ____ error in AWS MWAA even with requirements.txt

I've uploaded my requirementst.txt to a dag and referenced it when creating my Airflow Environment. Here is what my requirements.txt looks like:

apache-airflow==1.10.12
oauth2client==4.1.3
google-api-python-client==2.2.0
Flask-AppBuilder==2.3.3
boto3==1.17.59

However, I keep getting a "No module named oauthclient" error in my airflow environment. How do I check if oauthclient is actually installed or if Airflow is not reading my requirements.txt file correctly?

Thanks in advance.

I solved this by recreating my environment. It looks like AWS MWAA only runs your requirements.txt once and so any updates you make after you have made your environment will not be applied.