Wrap more errors

jwt/login.go

@@ -39,7 +39,7 @@ func (tv *TokenVerifier) CreateToken(user *postgres.User) (string, error) {
 	// Generate encoded token and send it as response.
 	t, err := token.SignedString([]byte(secret))
 	if err != nil {
-		return "", err
+		return "", fmt.Errorf("create token: %w", err)
 	}
 
 	return t, nil