Api Manager 4.1.0 WWW-Authenticate header value : null Basic Auth

[vidurananayakkara]

Description

Hi,
When a request with no authentication header is sent to the gateway the WWW-Authenticate header value contains a “null” value. I tested the same in 4.0.0 version and 3.2.0 and this “null” is not returned, check some samples below:
WWW-Authenticate header value

Api Manager 3.2.0

• Basic -> Basic Auth realm="WSO2 API Manager", error="invalid_token", error_description="The access token expired"
  Api Manager 4.0.0:
• Basic -> Internal API Key realm="WSO2 API Manager", Basic Auth realm="WSO2 API Manager", error="invalid_token", error_description="The provided token is invalid"
• Oauth + Basic -> Internal API Key realm="WSO2 API Manager", Bearer realm="WSO2 API Manager", Basic Auth realm="WSO2 API Manager", error="invalid_token", error_description="The provided token is invalid"
  Api Manager 4.1.0:
• Basic -> null Basic Auth realm="WSO2 API Manager", error="invalid_token", error_description="The provided token is invalid"
• Oauth + Basic -> null Bearer realm="WSO2 API Manager" Basic Auth realm="WSO2 API Manager", error="invalid_token", error_description="The provided token is invalid"

As per my understanding the null should be removed

Steps to Reproduce

N/A

Affected Component

APIM

Version

4.1.0

Environment Details (with versions)

No response

Relevant Log Output

No response

Related Issues

No response

Suggested Labels

patch

[msm1992]

Public PR : wso2/carbon-apimgt#11251