In Dialogflow, select the settings icon and then click the Project ID to open up Google Cloud Platform.
In Google Cloud Platform, select Service Accounts under IAM & Admin. Next to the Service Account with name Dialogflow Integrations, select the three dots under Actions. Select Create Key and then download the JSON file. Open the JSON file in a text editor and copy text.
In Hootsy, select ‘Set Google Account Key’ under Conversations for your selected assistant and paste JSON. Set Project ID in Hootsy to the ID set in Dialogflow (refer to first image above).