[MM-33794] Improve password generation during bulk import (#17147)

Automatic Merge

app/import_functions.go

@@ -337,8 +337,12 @@ func (a *App) importUser(data *UserImportData, dryRun bool) *model.AppError {
 		password = *data.Password
 		authData = nil
 	} else {
+		var err error
 		// If no AuthData or Password is specified, we must generate a password.
-		password = model.GeneratePassword(*a.Config().PasswordSettings.MinimumLength)
+		password, err = generatePassword(*a.Config().PasswordSettings.MinimumLength)
+		if err != nil {
+			return model.NewAppError("importUser", "app.import.generate_password.app_error", nil, err.Error(), http.StatusInternalServerError)
+		}
 		authData = nil
 	}