Hello friends,
Sorry to bother you but after an afternoon of trying to find a solution, I just found a brain on fire >_<
What am I trying to do?
I’d like to query data on my GraphQL Apollo server from the 2 databases.
So far I have managed to get the entities created on my second database. But the queries and mutation are not displayed in my graphql playground. I thought it was normal, my apollo server is probably connected to the 1st db only.
But then how to do ?
The only documentation I found was with Ben Amad here. Unfortunately, I can’t really adapt it to my stack (Mongoose, typegraphql, typegoose, express, apollo), in other word: it doesn’t work for me 
Here is my code for my server if you want to see what I tried:
async function createServer() {
try {
// Create mongoose connection
await createSession()
// Create express server
const app = express()
// Allow CORS from client app
const corsOptions = {
origin: 'http://localhost:4000',
credentials: true,
}
app.use(cors(corsOptions))
// Allow JSON requests
app.use(express.json())
// Initialize GraphQL schema
const schema = await createSchema()
// Create GraphQL server
const apolloServer = new ApolloServer({
schema,
context: ({ req, res }) => ({
req,
res,
connectionName: 'graphql1',
}),
introspection: true,
// Enable GraphQL Playground with credentials
plugins: [
process.env.NODE_ENV === 'production'
? ApolloServerPluginLandingPageProductionDefault({ footer: false })
: ApolloServerPluginLandingPageGraphQLPlayground({
endpoint: '/graphql1',
settings: {
'request.credentials': 'include',
},
}),
],
})
const apolloServerTrading = new ApolloServer({
schema,
context: ({ req, res }) => ({
req,
res,
connectionName: 'graphql2',
}),
introspection: true,
// Enable GraphQL Playground with credentials
plugins: [
process.env.NODE_ENV === 'production'
? ApolloServerPluginLandingPageProductionDefault({ footer: false })
: ApolloServerPluginLandingPageGraphQLPlayground({
endpoint: '/graphql2',
settings: {
'request.credentials': 'include',
},
}),
],
})
await apolloServer.start()
await apolloServerTrading.start()
apolloServer.applyMiddleware({ app, cors: corsOptions, path: '/graphql1' })
apolloServer.applyMiddleware({ app, cors: corsOptions, path: '/graphql2' })
// Start the server
app.listen({ port }, () => {
info(
`🚀 GraphQL 1 running at http://localhost:${port}${apolloServer.graphqlPath}`,
)
info(
`🚀 GraphQL 2 running at http://localhost:${port}${apolloServer.graphqlPath}`,
)
})
} catch (err) {
error(err)
}
}
createServer()
Thank you so much 
Have a good night dev!