@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")
    @JsonProperty("created_at")
    public Date getCreatedAt() {
        return createdAt;
    }
@ JsonFormat ( shape = JsonFormat . Shape . STRING , pattern = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" ) @ JsonProperty ( "created_at" ) public Date getCreatedAt ( ) { return createdAt ; }
Getter for the date this user was created on.

@return the created at.