This will run aws sts get-session-token with the required flags and then update ~/.aws/credentials
By default the default profile in ~/.aws/credentials is used. This can be changed by using the --profile flag
Example usage:
aws-2fa --serial-number arn:aws:iam::123456789:mfa/test --token-code 12345 --mfa-profile mfa_profile
To see all possible options
aws-2fa --help