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How Suprsend identifies a user

SuprSend identifies users with immutable distinct_id. It’s best to map the same identifier in your DB with distinct_id in SuprSend. Do not use identifiers that can be changed like email or phone number. You can view synced users by searching distinct_id on Users page.
Please note: you cannot change a user’s id once it has been set, so we recommend you use a non-transient id like a primary key rather than a phone number or email address.

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Create User

To create a new user or to update an existing user, you’ll have to fetch user instance. Call supr_client.user.get_instance to instantiate user object. 
import org.json.JSONObject;
import suprsend.Suprsend;
import suprsend.Subscriber;

public class UserEdit {
  public static void main(String[] args) throws Exception {
    getInstance();
  }

  private static Subscriber getSuprClient() throws SuprsendException {
    Suprsend suprsendClient = new Suprsend("_workspace_key_", "_workspace_secret_");
    return suprsendClient;
  }

  private static Subscriber getInstance() throws SuprsendException {
    Suprsend suprsendClient = getSuprClient();
    // Instiantiate user
    String distinctId = "_distinct_id_";

    Subscriber user = suprClient.user.getInstance(distinctId);
    return user;
  }
}

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Edit User

To Edit user, you need to first fetch user instance, call all the update methods and save changes using user.save method. 
import org.json.JSONObject;
import suprsend.Suprsend;
import suprsend.Subscriber;

public class UserEdit {

  public static void updateProfile() throws Exception {
    Suprsend suprsendClient = getSuprClient();
    // User Edit Instance
    String distinctID = "_distinct_id_";
    Subscriber user = suprsendClient.user.getInstance(distinctID);

    // Edit Helper methods
    user.addEmail("example@example.com");
    user.setTimezone("America/New_York");

    // Save
    JSONObject response = user.save();
    System.out.println(response);
  }
}
Here’s a list of all edit methods:
After calling add_*/remove_*/unset methods, don’t forget to call users.save() since user edit is async update and the changes will be sent to SuprSend only after calling this method.

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Bulk Update Users

There isn’t any limit on number-of-records that can be added to bulk_users instance. Use .append() on bulk_users instance to add however-many-records to call in bulk. 
//Creating bulk instance
BulkSubscribers bulkIns = suprClient.bulkUsers.newInstance();

// Prepare multiple users
String distinctID1 = "__distinct_id1__"; // User 1
User u1 = suprsendClient.user.getInstance(distinctID1);
u1.addEmail("u1@example.com");

String distinctID2 = "__distinct_id2__"; // User 2
User u2 = suprsendClient.user.getInstance(distinctID2);
u2.addEmail("u2@example.com");

// --- use .append on bulk instance to add one or more records
bulkIns.append(u1);
bulkIns.append(u2);
// OR
bulkIns.append(u1, u2);

// Save
JSONObject response = bulkIns.save();
System.out.println(response);
Bulk API supported in SDK version 0.2.0 and above:Bulk API is supported in SuprSend python-sdk version 0.2.0 and above. If you are using an older version, please upgrade to the latest SDK version.

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Get user details

Fetch User by passing distinct_id 
String distinctId = "_distinct_id_";

JSONObject res = suprClient.users.get(distinctId);
System.out.println(response);

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Delete user

Delete User by passing distinct_id. Delete action will take into immediate effect. 
String distinctId = "_distinct_id_";

JSONObject res = suprClient.users.delete(distinctId);
System.out.println(response);

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Get list of objects subscribed by user

You can pass optional query parameters -limit,before,after 
String distinctId = "_distinct_id_";

// optional params to pass limit (default=10) and cursor pointer for fetching the next set of results
HashMap < String, Object > opts = new HashMap < String, Object > () {
  {
    put("limit", 10);
    put("after", "01HFS04E4J29KHPYRK7HT3YQQ5");
  }
};

JSONObject res = suprClient.users.getObjectsSubscribedTo(distinctId, opts);
System.out.println(response);

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Get lists subscribed by user

You can pass optional query parameters -limit, before, after 
String distinctId = "_distinct_id_";

// optional params to pass limit (default=10) and cursor pointer for fetching the next set of results
HashMap < String, Object > opts = new HashMap < String, Object > () {
  {
    put("limit", 10);
    put("after", "01HFS04E4J29KHPYRK7HT3YQQ5");
  }
};

JSONObject res = suprClient.users.getListsSubscribedTo(distinctId, opts);
System.out.println(response);