The following is from the Salesforce Website:

⚠️ It may take 2–10 minutes for the app to become active after saving.
In App Manager, locate your app, click the dropdown arrow next to it, and select View.
Then click Manage Consumer Details to access your Consumer Key and Consumer Secret
Depending on your Salesforce configuration, the OAuth token endpoint may be:
• https://login.salesforce.com/services/oauth2/token (for most standard setups), or
• a custom domain URL defined under Setup → Company Settings → My Domain, such as: https://your-custom-domain.my.salesforce.com/services/oauth2/token
Make sure to use the appropriate URL based on your organization’s domain settings & ensure it ends with /services/oauth2/token
Record the following values — they are required to connect Playforce to Salesforce:
Environment Variable | Description | Example Value
----------------------------|----------------------------------|---------------------------------------------------
SALESFORCE_TOKEN_URL | OAuth token endpoint | https://login.salesforce.com/services/oauth2/token
SALESFORCE_CONSUMER_KEY | Found in the app's detail page | 3MVG9Z...
SALESFORCE_CONSUMER_SECRET | Found in the app's detail page | 1234567890abcdef
SALESFORCE_API_VERSION | Optional – override API version | 59.0