public void setAuth(java.util.Collection<UserAuthConfig> auth) {
        if (auth == null) {
            this.auth = null;
            return;
        }

        this.auth = new com.amazonaws.internal.SdkInternalList<UserAuthConfig>(auth);
    }
<p>
The authorization mechanism that the proxy uses.
</p>

@param auth
       The authorization mechanism that the proxy uses.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/CreateDBProxyRequest.java