MM-31063: Change constants to use CamelCase (#16608)

* MM-31063: Change constants to use CamelCase

* store package

* change allcaps to camel case (#16615)

* New tools.mod

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

app/session.go

@@ -420,7 +420,7 @@ func (a *App) CreateUserAccessToken(token *model.UserAccessToken) (*model.UserAc
 		var nfErr *store.ErrNotFound
 		switch {
 		case errors.As(nErr, &nfErr):
-			return nil, model.NewAppError("CreateUserAccessToken", MISSING_ACCOUNT_ERROR, nil, nfErr.Error(), http.StatusNotFound)
+			return nil, model.NewAppError("CreateUserAccessToken", MissingAccountError, nil, nfErr.Error(), http.StatusNotFound)
 		default:
 			return nil, model.NewAppError("CreateUserAccessToken", "app.user.get.app_error", nil, nErr.Error(), http.StatusInternalServerError)
 		}
@@ -469,7 +469,7 @@ func (a *App) createSessionForUserAccessToken(tokenString string) (*model.Sessio
 		var nfErr *store.ErrNotFound
 		switch {
 		case errors.As(nErr, &nfErr):
-			return nil, model.NewAppError("createSessionForUserAccessToken", MISSING_ACCOUNT_ERROR, nil, nfErr.Error(), http.StatusNotFound)
+			return nil, model.NewAppError("createSessionForUserAccessToken", MissingAccountError, nil, nfErr.Error(), http.StatusNotFound)
 		default:
 			return nil, model.NewAppError("createSessionForUserAccessToken", "app.user.get.app_error", nil, nErr.Error(), http.StatusInternalServerError)
 		}