Where can I find my authentication key?
On your Dashboard, click on the 'Flow and APIs'
On this page, under configure, there is an option of Create New, put the desired details to generate the authkey.
The authkey will get created as below, you can also generate multiple auth keys for your account and name them, this can be useful if you are using the same account for 2 or more applications/websites and you can disable/enable any of the auth keys if required.
Note- We suggest to enable the additional IP security after creating the authkey for security reasons.