Fix config validation, and messup with connect function call

tap_mysql/client.py

@@ -438,7 +438,7 @@ def get_records(self, context: dict | None) -> Iterable[dict[str, Any]]:
             if start_val:
                 query = query.filter(replication_key_col >= start_val)
 
-        with self.connector.connect() as conn:
+        with self.connector._connect() as conn:  # noqa: SLF001
             if self.connector.is_vitess:
                 conn.exec_driver_sql(
                     "set workload=olap"

tap_mysql/tap.py

@@ -35,12 +35,16 @@ def __init__(
         See https://github.com/MeltanoLabs/tap-postgres/issues/141
         """
         super().__init__(*args, **kwargs)
-        if (self.config.get("sqlalchemy_url") is not None) or (
-            self.config.get("host") is not None
-            and self.config.get("port") is not None
-            and self.config.get("user") is not None
-            and self.config.get("password") is not None
-        ):
+        sql_alchemy_url_exists = self.config.get("sqlalchemy_url") is not None
+        individual_url_params_exist = all(
+            [
+                self.config.get("host") is not None,
+                self.config.get("port") is not None,
+                self.config.get("user") is not None,
+                self.config.get("password") is not None,
+            ]
+        )
+        if not (sql_alchemy_url_exists or individual_url_params_exist):
             msg = (
                 "Need either the sqlalchemy_url to be set or host, port, "
                 "user, and password to be set"