use admin
db.createUser(
{
   user: "admin",
   pwd: "password",
   roles:["root"]
})

spring.data.mongodb.host=ip
spring.data.mongodb.port=27017
spring.data.mongodb.username=admin
spring.data.mongodb.password=password
spring.data.mongodb.database=user
spring.data.mongodb.authentication-database=admin

db.createUser(
{
   user: "admin",
   pwd: "password",
   roles: [
             { role: "userAdminAnyDatabase", db: "admin" },
             { role: "readWriteAnyDatabase", db: "admin" },
             { role: "dbAdminAnyDatabase", db: "admin" },
             { role: "clusterAdmin", db: "admin" }
          ]
})