AuthFlowType: "USER_AUTH" | "USER_SRP_AUTH" | "CUSTOM_WITH_SRP" | "CUSTOM_WITHOUT_SRP" | "USER_PASSWORD_AUTH"

Cognito supported AuthFlowTypes that may be passed as part of the Sign In request. USER_AUTH is a superset that can handle both USER_SRP_AUTH and USER_PASSWORD_AUTH, providing flexibility for future authentication methods.