If you want to play with JWT tokens and see how they work, check [https://jwt.io](https://jwt.io/).

## Install `PyJWT` { #install-pyjwt }

We need to install `PyJWT` to generate and verify the JWT tokens in Python.

                        null,
                        "artifactId of a plugin must be defined. ",
                        plugin);
            }

            // This will catch cases like <version></version> or <version/>
            if (plugin.getVersion() != null && plugin.getVersion().trim().isEmpty()) {
                addViolation(
                        problems,

            } catch (final InvalidKeyException e) {
                throw new InvalidKeyRuntimeException(e);
            } catch (final NoSuchAlgorithmException e) {
                throw new NoSuchAlgorithmRuntimeException(e);
            } catch (final NoSuchPaddingException e) {
                throw new NoSuchPaddingRuntimeException(e);
            } catch (final UnsupportedEncodingException e) {

	NoLock                              bool      // indicates to lower layers if the caller is expecting to hold locks.
	HasIfMatch                          bool      // indicates if the request has If-Match header
	ProxyRequest                        bool      // only set for GET/HEAD in active-active replication scenario
	ProxyHeaderSet                      bool      // only set for GET/HEAD in active-active replication scenario

replication, the replication status is reflected as `PENDING`.

If 3 or more targets are participating in active-active replication, the replication configuration for replica metadata sync, delete marker replication and delete replication should match to avoid inconsistent picture between the clusters. It is not recommended to turn on asymmetric replication - for e.g. if three sites A,B,C are participating in replication, it would be better to avoid replication setups like A -> [B, C], B -> A. In...

    /**
     * Creates a directory watch
     *
     * The server will notify the client when there are changes to the directories contents
     *
     * @param filter
     *            see constants in {@link FileNotifyInformation}
     * @param recursive
     *            whether to also watch subdirectories
     * @return watch context, needs to be closed when finished

                        writer.write(metadata);
                    }
                });
            } catch (final SsoMessageException e) {
                throw e;
            } catch (final Exception e) {
                throw new SsoMessageException(

 * error message template strings. This only supports the {@code "%s"} specifier, not the full range
 * of {@link java.util.Formatter} specifiers. However, note that if the number of arguments does not
 * match the number of occurrences of {@code "%s"} in the format string, {@code Verify} will still
 * behave as expected, and will still include all argument values in the error message; the message

	} else {
		// Check that the roleID is restricted to URL safe characters
		// (base64 URL encoding chars).
		if !validRoleIDRegex.MatchString(roleID) {
			return args, config.Errorf("Role ID must match the regexp `^[a-zA-Z0-9_-]+$`")
		}

		// Use the user provided ID here.
		resourceID += roleID
	}

	roleArn, err := arn.NewIAMRoleARN(resourceID, serverRegion)
	if err != nil {

					singleNode = true
				}

				if len(node.disks) <= i {
					stopping = true
					continue
				}
				if stopping {
					return layout, errors.New("number of disks per node does not match")
				}
				eps = append(eps, node.disks[i])
			}
			if stopping {
				break
			}
		}

		for _, node := range endpointsList {
			if node.nodeName != "" && singleNode {