Post.kt

@Entity
data class Post(
    @PrimaryKey
    @SerializedName("id")
    val id: String,
    @SerializedName("sender")
    @ColumnInfo
    val sender: String?,
    @SerializedName("caption")
    @ColumnInfo
    val caption: String?,
    @SerializedName("media")
    @ColumnInfo
    val media: String?,
    @SerializedName("timestamp")
    @ColumnInfo
    val timestamp: Long?
)