Author: rfaulkner
Description:
When a user cohort or metric is not found flag this as an error to the user.
Validate cohort names in URL. Write a method to validate from usertage_meta table.
See the output and cohort views in https://github.com/rfaulkner/E3_analysis/blob/master/user_metrics/api/views.py
Call validation in views.py on cohort names at the following points:
https://github.com/rfaulkner/E3_analysis/blob/master/user_metrics/api/views.py#L186
https://github.com/rfaulkner/E3_analysis/blob/master/user_metrics/api/views.py#L241
Version: unspecified
Severity: normal