BAEL-315 reducing the number of users to simplify the code.

spring-cloud/spring-cloud-bootstrap/discovery/src/main/java/com/baeldung/spring/cloud/bootstrap/discovery/SecurityConfig.java

@@ -15,21 +15,9 @@ public class SecurityConfig extends WebSecurityConfigurerAdapter {
     @Autowired
     public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception{
         auth.inMemoryAuthentication()
-                .withUser("disc_configUser")
-                .password("configPassword")
-                .roles("SYSTEM")
-            .and()
-                .withUser("disc_discUser")
+                .withUser("discUser")
                 .password("discPassword")
                 .roles("SYSTEM")
-            .and()
-                .withUser("disc_gatewayUser")
-                .password("gatewayPassword")
-                .roles("SYSTEM")
-            .and()
-                .withUser("disc_resourceUser")
-                .password("resourcePassword")
-                .roles("SYSTEM")
             .and()
                 .withUser("admin")
                 .password("password")

spring-cloud/spring-cloud-bootstrap/discovery/src/main/resources/bootstrap.properties

@@ -1,4 +1,4 @@
 spring.cloud.config.name=discovery
 spring.cloud.config.uri=http://localhost:8081
-spring.cloud.config.username=config_discUser
-spring.cloud.config.password=discPassword
+spring.cloud.config.username=configUser
+spring.cloud.config.password=configPassword