assertEquals(
        "size1Collection.toString should return [{element}]",
        "[" + e0() + "]",
        collection.toString());
  }

  @CollectionSize.Require(SEVERAL)
  @CollectionFeature.Require(value = KNOWN_ORDER, absent = NON_STANDARD_TOSTRING)
  public void testToString_sizeSeveral() {
    String expected = copyToList(getOrderedElements()).toString();

  # Can use regexp here: `generated.*`, regexp is applied on full path,
  # including the path prefix if one is set.
  # Default dirs are skipped independently of this option's value (see exclude-dirs-use-default).
  # "/" will be replaced by current OS file path separator to properly work on Windows.
  # Default: []
  exclude-dirs:
    - genfiles$
    - vendor$

        getNullLocation(),
        find(null));
  }

  public void testFind_wrongType() {
    try {
      assertEquals(
          getMethodName() + "(wrongType) should return -1 or throw", -1, find(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }
  }

    /**
     * Gets the user properties to use for interpolation and profile activation. The user properties have been
     * configured directly by the user on his discretion, e.g. via the {@code -Dkey=value} parameter on the command
     * line.
     *
     * @return The user properties, never {@code null}.
     */
    Map<String, String> getUserProperties();

    /**

		Ciphertext: `{"aead":"ChaCha20Poly1305","iv":"r4+yfiVbVIYR0Z2I9Fq+6g==","nonce":"2YpwGwE59GcVraI3","bytes":"k/svMglOU7/Kgwv73heG38NWW575XLcFp3SaxQHDMjJGYyRI3Fiygu2OeutGPXNL"}`,
		Context:    Context{"key": "value"},
	},

	Description  string                 `xml:"-" json:"description,omitempty"`

	// Deprecated: In favor of Description - when reading credentials from
	// storage the value of this field is placed in the Description field above
	// if the existing Description from storage is empty.
	Comment string `xml:"-" json:"comment,omitempty"`
}

func (cred Credentials) String() string {

        # o columnExceptMap: (NotRequired - Default map:{})
        #  If you want to exclude some columns in generating target,
        #  you should specify the list of excepted column hints.
        #    e.g. map:{HEAVY_MASTER = list:{APP_NOT_USED_ID; suffix:_IMAGE}}
        #  This is only for the main schema. Additional schemas are unconcerned.
        #
        #; columnExceptMap = map:{

import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A future whose value is derived from a collection of input futures.
 *
 * @param <InputT> the type of the individual inputs
 * @param <OutputT> the type of the output (i.e. this) future
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault

	defer cancel()

	bi, err := listBucketsRPC.Call(ctx, client.gridConn(), &opts)
	if err != nil {
		return nil, toStorageErr(err)
	}
	buckets := make([]BucketInfo, 0, len(bi.Value()))
	for _, b := range bi.Value() {
		if b != nil {
			buckets = append(buckets, *b)
		}
	}
	bi.Recycle() // BucketInfo has no internal pointers, so it's safe to recycle.
	return buckets, nil
}

So, to avoid ID collisions, when creating the JWT token for the user, you could prefix the value of the `sub` key, e.g. with `username:`. So, in this example, the value of `sub` could have been: `username:johndoe`.

The important thing to keep in mind is that the `sub` key should have a unique identifier across the entire application, and it should be a string.