title: Mutual SSL in WSO2 API Manager 3.0.0
body: <p>While trying to configure Mutual SSL for an API, below error is thrown:</p>
  
  <pre><code>TID: [-1234] [] [2020-01-14 11:43:09,542] ERROR {org.wso2.carbon.apimgt.gateway.handlers.security.authenticator.MutualSSLAuthenticator} - Mutual SSL authentication failure
  TID: [-1234] [] [2020-01-14 11:43:09,544]  WARN {org.wso2.carbon.apimgt.gateway.handlers.security.APIAuthenticationHandler} - API authentication failure due to Invalid Credentials
  
  &lt;ams:fault xmlns:ams="http://wso2.org/apimanager/security"&gt;&lt;ams:code&gt;900901&lt;/ams:code&gt;&lt;ams:message&gt;Invalid Credentials&lt;/ams:message&gt;&lt;ams:description&gt;Invalid Credentials. Make sure you have provided the correct security credentials&lt;/ams:description&gt;&lt;/ams:fault&gt;
  </code></pre>
  
  <p>For this API, only "Transport Level Security" is kept mandatory whereas "Application Level Security" is kept as optional. Please advise on how to achieve mutual SSL working on the wso2 API Manager 3.0.0</p>