feat: refac and add key deletion route

internal/server/database/functions.go

@@ -30,6 +30,12 @@ func ListKeys(db *gorm.DB) ([]AccessKey, error) {
 	return keys, err
 }
 
+func FindKeyByName(db *gorm.DB, name string) (AccessKey, error) {
+	var key AccessKey
+	err := db.Where("key_name = ?", name).First(&key).Error
+	return key, err
+}
+
 func CreateKey(db *gorm.DB, k *AccessKey) error {
 	return db.Create(&k).Error
 }