Added add-administrator-to-agent-pool.md

DevOps/add-administrator-to-agent-pool.md

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+# How to add an administrator to an agent pool
+1. Open 'Project settings' in lower left corner of screen
+1. Click 'Agent Pools' under the Pipelines section
+1. Click on the agent pool you would like to modify
+1. Click on the security tab
+1. Click the + button
+1. Type the name of the user you would like to add and select them from the list
+1. Change the role to 'Administrator'
+1. Click 'Add'