You can’t. AMQP 1.0 support, including to IoT Hub, is disabled, due to stability concerns (it kept crashing the server and killing all developer, and some production, agents). This, as you can imagine, is not something we’re happy with.
Until we’ve investigated the cause of the crash, written some more system tests (particularly stress tests), and we’re confident that the code is stable, AMQP will remain disabled on the developer server.
In the interim, if you need AMQP support (i.e. for IoT Hub), contact firstname.lastname@example.org, providing your device IDs, and we’ll discuss moving you to another server where AMQP is still available (but potentially crashy).