feat(auth): Add login, register, session_info and api creation

app/utils/sql.go

@@ -0,0 +1,25 @@
+package utils
+
+import (
+	"errors"
+	"strings"
+
+	"gorm.io/gorm"
+)
+
+// IsDuplicateKeyError checks if an error is a duplicate key constraint violation
+func IsDuplicateKeyError(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	// Check for GORM duplicate key error
+	if errors.Is(err, gorm.ErrDuplicatedKey) {
+		return true
+	}
+
+	// Check for PostgreSQL duplicate key error (SQLSTATE 23505)
+	errMsg := strings.ToLower(err.Error())
+	return strings.Contains(errMsg, "duplicate key value violates unique constraint") ||
+		strings.Contains(errMsg, "sqlstate 23505")
+}