fix: this.end is not a function error

Author: avallete

src/lib/db.ts

@@ -198,9 +198,11 @@ ${' '.repeat(5 + lineNumber.toString().length + 2 + lineOffset)}^
           }
           return { data: null, error: { code: error.code, message: error.message } }
         } finally {
-          // If the error isn't a "DatabaseError" assume it's a connection related we kill the connection
-          // To attempt a clean reconnect on next try
-          await this.end()
+          if (this && this.end) {
+            // If the error isn't a "DatabaseError" assume it's a connection related we kill the connection
+            // To attempt a clean reconnect on next try
+            await this.end()
+          }
         }
       }
     },