Resolve "Improve token usage for users"

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Resolves to #378

controller/northbound/server/auth.go

@@ -155,7 +155,7 @@ func (s AuthServer) isCorrectPassword(storedPassword, salt, loginPassword string
 }
 
 // handleLogout checks if the provided user name matches with the one associated with token and
-// removed the token from all tokens of the user
+// removed the token from all tokens of the user.
 func (s AuthServer) handleLogout(ctx context.Context, userName string) error {
 	md, ok := metadata.FromIncomingContext(ctx)
 	if !ok {
@@ -183,7 +183,10 @@ func (s AuthServer) handleLogout(ctx context.Context, userName string) error {
 		foundToken := false
 		for _, storedToken := range storedTokens {
 			if storedToken == token {
-				storedUser.RemoveToken(token)
+				err := storedUser.RemoveToken(token)
+				if err != nil {
+					return status.Errorf(codes.Aborted, "error checking match of token provied for user")
+				}
 				foundToken = true
 				break
 			}