Add /api/customers endpoint in admin

lib/admin/admin-server.js

@@ -27,6 +27,7 @@ const login = require('./login')
 const pairing = require('./pairing')
 const server = require('./server')
 const transactions = require('./transactions')
+const customers = require('../customers')
 const funding = require('./funding')
 
 const NEVER = new Date(Date.now() + 100 * T.years)
@@ -168,6 +169,12 @@ app.patch('/api/transaction/:id', (req, res, next) => {
   .catch(() => res.status(404).send({Error: 'Not found'}))
 })
 
+app.get('/api/customers', (req, res, next) => {
+  return customers.batch()
+  .then(r => res.send({customers: r}))
+  .catch(next)
+})
+
 app.use((err, req, res, next) => {
   console.error(err)