po poprawkach

src/main/java/com/sasiedzi/event/domain/Event.java

@@ -44,7 +44,7 @@ public class Event implements Serializable {
     private String comment;
 
     @OneToMany(fetch = FetchType.EAGER, mappedBy = "event")
-    @JsonIgnoreProperties(value = { "user", "event" }, allowSetters = true)
+    @JsonIgnoreProperties(value = { "event" }, allowSetters = true)
     private Set<Registration> registrations = new HashSet<>();
 
     // jhipster-needle-entity-add-field - JHipster will add fields here

src/main/java/com/sasiedzi/event/domain/Registration.java

@@ -37,7 +37,7 @@ public class Registration implements Serializable {
     @Column(name = "comment")
     private String comment;
 
-    @ManyToOne(fetch = FetchType.LAZY)
+    @ManyToOne(fetch = FetchType.EAGER)
     private User user;
 
     @ManyToOne(fetch = FetchType.LAZY)