Add Snowflake authenticator param to docs (#650)

* Add Snowflake authenticator arg to docs

* Tweak

* make note about not using okta

* make user not required

---------

Co-authored-by: Ryan Eakman <6326532+eakmanrq@users.noreply.github.com>

Author: foundinblank

docs/guides/connections.md

@@ -109,9 +109,10 @@ A Snowflake connection should be configured as follows:
 connections:
     my_snowflake_connection:
         type: snowflake
-        user: [username]
-        password: [password]
-        account: [account ID]
+        user: [required if not using Okta, username]
+        password: [required if using password]
+        authenticator: [required if using externalbrowser]
+        account: [required, account ID]
         warehouse: [optional, warehouse name]
         database: [optional, database name]
         role: [optional, user role]

docs/integrations/engines.md

@@ -180,14 +180,15 @@ sqlmesh_airflow = SQLMeshAirflow(
 
 # Snowflake
 ## Snowflake - Local/Built-in Scheduler
-| Option      | Description                  |  Type  | Required |
-|-------------|------------------------------|:------:|:--------:|
-| `user`      | The Snowflake username       | string |    Y     |
-| `password`  | The Snowflake password       | string |    Y     |
-| `account`   | The Snowflake account name   | string |    Y     |
-| `warehouse` | The Snowflake warehouse name | string |    N     |
-| `database`  | The Snowflake database name  | string |    N     |
-| `role`      | The Snowflake role name      | string |    N     |
+| Option          | Description                        |  Type  | Required |
+|-----------------|------------------------------------|:------:|:--------:|
+| `user`          | The Snowflake username             | string |    N     |
+| `password`      | The Snowflake password             | string |    N     |
+| `authenticator` | The Snowflake authenticator method | string |    N     |
+| `account`       | The Snowflake account name         | string |    Y     |
+| `warehouse`     | The Snowflake warehouse name       | string |    N     |
+| `database`      | The Snowflake database name        | string |    N     |
+| `role`          | The Snowflake role name            | string |    N     |
 
 ## Snowflake - Airflow Scheduler
 **Engine Name:** `snowflake`