import neo4j, { AuthToken } from 'neo4j-driver'
/**
 * Method called whenever the driver needs to refresh the token.
 *
 * The refresh will happen if the driver is notified by the server
 * about a token expiration or if the `Date.now() > tokenData.expiry`
 *
 * Important, the driver will block all the connections creation until
 * this function resolves the new auth token.
 */
async function fetchAuthTokenFromMyProvider () {
   const bearer: string = await myProvider.getBearerToken()
   const token: AuthToken = neo4j.auth.bearer(bearer)
   const expiration: Date = myProvider.getExpiryDate()  
   return {
      token,
      // if expiration is not provided, 
      // the driver will only fetch a new token when a failure happens
      expiration 
   }
}
const driver = neo4j.driver(
    'neo4j://localhost:7687', 
    neo4j.expirationBasedAuthTokenManager({ 
        tokenProvider: fetchAuthTokenFromMyProvider 
    })
)

import neo4j from 'neo4j-driver'
const driver =  neo4j.driver(
    'neo4j://localhost:7687', 
    neo4j.auth.basic('neo4j', 'password')
)
const sessionWithUserB = driver.session({
  database: 'neo4j',
  auth: neo4j.auth.basic('userB', 'userBpassword')
})
try {
  // run some queries as userB
  const result = await sessionWithUserB.executeRead(tx => tx.run('RETURN 1'))
} finally {
  // close the session as usual
  await sessionWithUserB.close()
}