Update README.md

Author: pasha-codefresh

README.md

@@ -35,7 +35,7 @@ In order to use the GitHub action, fork this repository and then navigate to the
 Select the pipeline runner action and click the "Edit" button. On the right side panel enter the following
 
 ### Inputs
-* A secret with name `CF_API_KEY` and value your Codefresh API token
+* A secret with name `CF_API_KEY` and value your Codefresh API token ( https://codefresh.io/docs/docs/integrations/codefresh-api/#authentication-instructions )
 * An environment variable called `PIPELINE_NAME` with a value of `<project_name>/<pipeline_name>`
 * An optional environment variable called `TRIGGER_NAME` with trigger name attached to this pipeline. See the [triggers section](https://codefresh.io/docs/docs/configure-ci-cd-pipeline/triggers/) for more information