usernameConfiguration

Sets the case sensitivity option for sign-in usernames. When CaseSensitive is false (case insensitive), users can sign in with any combination of capital and lowercase letters. For example, username , USERNAME , or UserName , or for email, email@example.com or EMaiL@eXamplE.Com . For most use cases, set case sensitivity to false as a best practice. When usernames and email addresses are case insensitive, Amazon Cognito treats any variation in case as the same user, and prevents a case variation from being assigned to the same attribute for a different user. When CaseSensitive is true (case sensitive), Amazon Cognito interprets USERNAME and UserName as distinct users. This configuration is immutable after you set it.

Sets the case sensitivity option for sign-in usernames. When CaseSensitive is false (case insensitive), users can sign in with any combination of capital and lowercase letters. For example, username , USERNAME , or UserName , or for email, email@example.com or EMaiL@eXamplE.Com . For most use cases, set case sensitivity to false as a best practice. When usernames and email addresses are case insensitive, Amazon Cognito treats any variation in case as the same user, and prevents a case variation from being assigned to the same attribute for a different user. When CaseSensitive is true (case sensitive), Amazon Cognito interprets USERNAME and UserName as distinct users. This configuration is immutable after you set it.