I downloaded my service account credential json file from Firebase console placed it earlier in the main directory of GAE endpoint project when I run my backed locally it gives Security exception.
java.security.AccessControlException: access denied ("java.io.FilePermission" "\src\main\secret.json" "read")
I tried placing the .json file under the src directory also but no help.
Finally, I found the solution, Its written under the APIs and references section of Google App Engine in this link, that we need to add such files in the appengine-web.xml file under the
<resource-files> tag, using
<include path=""/> property. After doing so its works for me. I placed the .json file containing project credentials in the WEB-INF directory and then entered its relative path in