public CreateBackendAuthUserPoolConfig withRequiredSignUpAttributes(String... requiredSignUpAttributes) {
        if (this.requiredSignUpAttributes == null) {
            setRequiredSignUpAttributes(new java.util.ArrayList<String>(requiredSignUpAttributes.length));
        }
        for (String ele : requiredSignUpAttributes) {
            this.requiredSignUpAttributes.add(ele);
        }
        return this;
    }
<p>
The required attributes to sign up new users in the user pool.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setRequiredSignUpAttributes(java.util.Collection)} or
{@link #withRequiredSignUpAttributes(java.util.Collection)} if you want to override the existing values.
</p>

@param requiredSignUpAttributes
       The required attributes to sign up new users in the user pool.
@return Returns a reference to this object so that method calls can be chained together.
@see RequiredSignUpAttributesElement
aws-java-sdk-amplifybackend/src/main/java/com/amazonaws/services/amplifybackend/model/CreateBackendAuthUserPoolConfig.java