koa-router 404 not found code example

Example: koa-router 404 not found

async getMessages(ctx) {
    const id = ctx.params.id

    const nameOfConversation = await ctx.db.Conversation.findById(id)

    ctx.body = await new Promise((resolve, reject) => {
        firebaseIndex.fbController.getConversation(nameOfConversation.name, async response => {
            resolve(response)
        })
    })
}