Add nullable back into EclipseUser object

src/main/java/org/eclipsefoundation/git/eca/api/models/EclipseUser.java

@@ -11,6 +11,7 @@
 **********************************************************************/
 package org.eclipsefoundation.git.eca.api.models;
 
+import javax.annotation.Nullable;
 
 import org.eclipsefoundation.git.eca.model.GitUser;
 import com.fasterxml.jackson.annotation.JsonIgnore;
@@ -36,6 +37,7 @@ public abstract class EclipseUser {
 
     public abstract boolean getIsCommitter();
 
+    @Nullable
     @JsonIgnore
     public abstract Boolean getIsBot();
 
@@ -74,7 +76,7 @@ public abstract class EclipseUser {
         public abstract Builder setIsCommitter(boolean isCommitter);
 
         @JsonIgnore
-        public abstract Builder setIsBot(boolean isBot);
+        public abstract Builder setIsBot(@Nullable Boolean isBot);
 
         public abstract EclipseUser build();
     }