Make user and pw fields optional for MSSQL connection (#2262)

Author: treysp

docs/integrations/engines/mssql.md

@@ -10,17 +10,17 @@ pip install "sqlmesh[mssql]"
 
 ### Connection options
 
-| Option            | Description                                                  | Type     | Required |
-|-------------------|--------------------------------------------------------------|:--------:|:--------:|
-| `type`            | Engine type name - must be `mssql`                           | string   | Y        |
-| `host`            | The hostname of the MSSQL server                             | string   | Y        |
-| `user`            | The username to use for authentication with the MSSQL server | string   | Y        |
-| `password`        | The password to use for authentication with the MSSQL server | string   | Y        |
-| `port`            | The port number of the MSSQL server                          | int      | N        |
-| `database`        | The target database                                          | string   | N        |
-| `charset`         | The character set used for the connection                    | string   | N        |
-| `timeout`         | The query timeout in seconds. Default: no timeout            | int      | N        |
-| `login_timeout`   | The timeout for connection and login in seconds. Default: 60 | int      | N        |
-| `appname`         | The application name to use for the connection               | string   | N        |
-| `conn_properties` | The list of connection properties                            | [string] | N        |
-| `autocommit`      | Is autocommit mode enabled. Default: false                   | bool     | N        |
+| Option            | Description                                                  |     Type     | Required |
+| ----------------- | ------------------------------------------------------------ | :----------: | :------: |
+| `type`            | Engine type name - must be `mssql`                           |    string    |    Y     |
+| `host`            | The hostname of the MSSQL server                             |    string    |    Y     |
+| `user`            | The username to use for authentication with the MSSQL server |    string    |    N     |
+| `password`        | The password to use for authentication with the MSSQL server |    string    |    N     |
+| `port`            | The port number of the MSSQL server                          |     int      |    N     |
+| `database`        | The target database                                          |    string    |    N     |
+| `charset`         | The character set used for the connection                    |    string    |    N     |
+| `timeout`         | The query timeout in seconds. Default: no timeout            |     int      |    N     |
+| `login_timeout`   | The timeout for connection and login in seconds. Default: 60 |     int      |    N     |
+| `appname`         | The application name to use for the connection               |    string    |    N     |
+| `conn_properties` | The list of connection properties                            | list[string] |    N     |
+| `autocommit`      | Is autocommit mode enabled. Default: false                   |     bool     |    N     |

sqlmesh/core/config/connection.py

@@ -964,8 +964,8 @@ def _connection_factory(self) -> t.Callable:
 
 class MSSQLConnectionConfig(ConnectionConfig):
     host: str
-    user: str
-    password: str
+    user: t.Optional[str] = None
+    password: t.Optional[str] = None
     database: t.Optional[str] = ""
     timeout: t.Optional[int] = 0
     login_timeout: t.Optional[int] = 60