diff --git a/cli/config/credentials/file_store.go b/cli/config/credentials/file_store.go
index 3b8955994d..5eca79dd12 100644
--- a/cli/config/credentials/file_store.go
+++ b/cli/config/credentials/file_store.go
@@ -27,6 +27,10 @@ func NewFileStore(file store) Store {
 
 // Erase removes the given credentials from the file store.
 func (c *fileStore) Erase(serverAddress string) error {
+	if _, exists := c.file.GetAuthConfigs()[serverAddress]; !exists {
+		// nothing to do; no credentials found for the given serverAddress
+		return nil
+	}
 	delete(c.file.GetAuthConfigs(), serverAddress)
 	return c.file.Save()
 }
@@ -52,9 +56,14 @@ func (c *fileStore) GetAll() (map[string]types.AuthConfig, error) {
 	return c.file.GetAuthConfigs(), nil
 }
 
-// Store saves the given credentials in the file store.
+// Store saves the given credentials in the file store. This function is
+// idempotent and does not update the file if credentials did not change.
 func (c *fileStore) Store(authConfig types.AuthConfig) error {
 	authConfigs := c.file.GetAuthConfigs()
+	if oldAuthConfig, ok := authConfigs[authConfig.ServerAddress]; ok && oldAuthConfig == authConfig {
+		// Credentials didn't change, so skip updating the configuration file.
+		return nil
+	}
 	authConfigs[authConfig.ServerAddress] = authConfig
 	return c.file.Save()
 }