how pass data from body in koa js
ctx.throw(400, 'Grant: mount session middleware first')
if (ctx.method === 'POST' && !ctx.request.body) {
ctx.throw(400, 'Grant: mount body parser middleware first')
ctx.session.grant.override = override
if (Object.keys(ctx.request.body || {}).length) {
ctx.session.grant.dynamic = ctx.request.body