Just fyi, I tried one your instance. Searched a user, clicked a result, and got an error.

Error

./app.lua:134: attempt to concatenate field 'username' (a nil value)

Traceback

stack traceback:
	./app.lua:134: in function 'handler'
	...ittygram/lua_modules/share/lua/5.1/lapis/application.lua:185: in function 'resolve'
	...ittygram/lua_modules/share/lua/5.1/lapis/application.lua:216: in function <...ittygram/lua_modules/share/lua/5.1/lapis/application.lua:214>
	[C]: in function 'xpcall'
	...ittygram/lua_modules/share/lua/5.1/lapis/application.lua:214: in function 'dispatch'
	/apps/kittygram/lua_modules/share/lua/5.1/lapis/nginx.lua:231: in function 'serve'
	content_by_lua(nginx.conf.compiled:92):2: in main chunk