How can I prevent user account details from being wiped when a user logs in for the first time on my Webflow Membership site created with Zapier and the Webflow API? Additionally, how can I handle updating user account fields with blank values without receiving errors from the API integration with Airtable?

To prevent user account details from being wiped when a user logs in for the first time on your Webflow Membership site created with Zapier and the Webflow API, you need to ensure that you're not overwriting existing user data when a user logs in for the first time.

When a user registers or logs in for the first time, you can create a logic in your Zapier workflow where you check if the user account exists in Webflow. If it does, you can choose not to update any existing fields in the user's Webflow CMS collection item. Instead, you can skip the Webflow update step in your Zap and only update the fields that are specific to the user authentication process.

For example, when a user registers or logs in for the first time, you can set up a Zap that performs the following steps:

1. Trigger: User register or login event.
2. Action: Retrieve the user account from Webflow based on their unique identifier (email, username, etc.).
3. Filter: Check if any fields on the retrieved user account are empty or have null-values (indicating that it's the user's first login).
4. Condition: If the filter step returns true (i.e., there are empty fields), continue with the Zap. If it returns false, skip the subsequent steps.
5. Action: Update the specific fields required for the user authentication process (e.g., set a "First Login" field to true).
6. Action: Sync the updated user data back to Webflow, excluding the fields related to the user authentication process (e.g., exclude the "First Login" field from being updated).

This way, you can ensure that only the necessary user account details are updated during the first login, without overwriting any existing data.

Regarding updating user account fields with blank values without receiving errors from the API integration with Airtable, you can handle this using conditional logic in your Zapier workflow.

When updating user account fields in Airtable, you can check if the value of a specific field is blank or null before updating it. If it is blank, you can choose to skip the update step in your Zap or provide a default value for the field.

Here's an example workflow for handling blank values in the API integration with Airtable:

1. Trigger: User account update event in Webflow.
2. Action: Retrieve the updated user account data from Webflow.
3. Filter: Check if any fields in the user account data have blank or null values.
4. Condition: If the filter step returns true (i.e., there are fields with blank values), continue with the Zap. If it returns false, skip the subsequent steps.
5. Action: Update the specific fields in Airtable, including only the non-blank values from the Webflow user account data.
6. Optionally, you can provide default values for the fields with blank values in Airtable if necessary.

By incorporating conditional logic in your Zap, you can handle and manage blank values in user account fields without encountering errors during the API integration with Airtable.