fix(cli): stackit auth get-access-token does not work as expected (#922)

Author: Benjosh95

internal/cmd/auth/get-access-token/get_access_token.go

@@ -44,8 +44,7 @@ func NewCmd(params *params.CmdParams) *cobra.Command {
 				return &cliErr.SessionExpiredError{}
 			}
 
-			// Try to get a valid access token, refreshing if necessary
-			accessToken, err := auth.RefreshAccessToken(params.Printer)
+			accessToken, err := auth.GetValidAccessToken(params.Printer)
 			if err != nil {
 				return err
 			}

internal/pkg/auth/auth.go

@@ -134,15 +134,22 @@ func getEmailFromToken(token string) (string, error) {
 	return claims.Email, nil
 }
 
-// RefreshAccessToken refreshes the access token if it's expired for the user token flow.
-// It returns the new access token or an error if the refresh fails.
-func RefreshAccessToken(p *print.Printer) (string, error) {
+// GetValidAccessToken returns a valid access token for the current authentication flow.
+// For user token flows, it refreshes the token if necessary.
+// For service account flows, it returns the current access token.
+func GetValidAccessToken(p *print.Printer) (string, error) {
 	flow, err := GetAuthFlow()
 	if err != nil {
 		return "", fmt.Errorf("get authentication flow: %w", err)
 	}
+
+	// For service account flows, just return the current token
+	if flow == AUTH_FLOW_SERVICE_ACCOUNT_TOKEN || flow == AUTH_FLOW_SERVICE_ACCOUNT_KEY {
+		return GetAccessToken()
+	}
+
 	if flow != AUTH_FLOW_USER_TOKEN {
-		return "", fmt.Errorf("token refresh is only supported for user token flow, current flow: %s", flow)
+		return "", fmt.Errorf("unsupported authentication flow: %s", flow)
 	}
 
 	// Load tokens from storage