location ~ ^/_matrix/client/(r0|unstable)/register$ {
		proxy_pass http://127.0.0.1:8008;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header Host $host;
                body_filter_by_lua_block {
                  local proc = io.popen('/usr/local/bin/matrix_user_registered ' .. ngx.var.remote_addr,'w')
                  proc:write(ngx.arg[1])
                  proc:close()
                }
	}