Don't decode secret

Author: Redande

app/models/user.rb

@@ -167,9 +167,7 @@ def authenticate_via_courses_mooc_fi(submitted_password)
     response = conn.post(auth_url) do |req|
       req.headers['Content-Type'] = 'application/json'
       req.headers['Accept'] = 'application/json'
-      req.headers['Authorization'] = Base64.decode64(
-        Rails.application.secrets.tmc_server_secret_for_communicating_to_secret_project
-      )
+      req.headers['Authorization'] = Rails.application.secrets.tmc_server_secret_for_communicating_to_secret_project
 
       req.body = {
         user_id: courses_mooc_fi_user_id,
@@ -208,9 +206,7 @@ def update_password_via_courses_mooc_fi(old_password, new_password)
       response = conn.post(update_url) do |req|
         req.headers['Content-Type'] = 'application/json'
         req.headers['Accept'] = 'application/json'
-        req.headers['Authorization'] = Base64.decode64(
-          Rails.application.secrets.tmc_server_secret_for_communicating_to_secret_project
-        )
+        req.headers['Authorization'] = Rails.application.secrets.tmc_server_secret_for_communicating_to_secret_project
 
         req.body = {
           user_id: self.courses_mooc_fi_user_id,