How to use the sequelize.TEXT function in sequelize

//
//  DataTypes
// ~~~~~~~~~~~
//
//  https://github.com/sequelize/sequelize/blob/v3.4.1/test/unit/sql/data-types.test.js
//

Sequelize.STRING;
Sequelize.STRING( 1234 );
Sequelize.STRING( { length : 1234 } );
Sequelize.STRING( 1234 ).BINARY;
Sequelize.STRING.BINARY;
Sequelize.TEXT;
Sequelize.TEXT( 'tiny' );
Sequelize.TEXT( { length : 'tiny' } );
Sequelize.TEXT( 'medium' );
Sequelize.TEXT( 'long' );
Sequelize.CHAR;
Sequelize.CHAR( 12 );
Sequelize.CHAR( { length : 12 } );
Sequelize.CHAR( 12 ).BINARY;
Sequelize.CHAR.BINARY;
Sequelize.BOOLEAN;
Sequelize.DATE;
Sequelize.DATE(6);
Sequelize.UUID;
Sequelize.UUIDV1;
Sequelize.UUIDV4;
Sequelize.NOW;
Sequelize.INTEGER;
Sequelize.INTEGER.UNSIGNED;

//  DataTypes
// ~~~~~~~~~~~
//
//  https://github.com/sequelize/sequelize/blob/v3.4.1/test/unit/sql/data-types.test.js
//

Sequelize.STRING;
Sequelize.STRING( 1234 );
Sequelize.STRING( { length : 1234 } );
Sequelize.STRING( 1234 ).BINARY;
Sequelize.STRING.BINARY;
Sequelize.TEXT;
Sequelize.TEXT( 'tiny' );
Sequelize.TEXT( { length : 'tiny' } );
Sequelize.TEXT( 'medium' );
Sequelize.TEXT( 'long' );
Sequelize.CHAR;
Sequelize.CHAR( 12 );
Sequelize.CHAR( { length : 12 } );
Sequelize.CHAR( 12 ).BINARY;
Sequelize.CHAR.BINARY;
Sequelize.BOOLEAN;
Sequelize.DATE;
Sequelize.DATE(6);
Sequelize.UUID;
Sequelize.UUIDV1;
Sequelize.UUIDV4;
Sequelize.NOW;
Sequelize.INTEGER;
Sequelize.INTEGER.UNSIGNED;
Sequelize.INTEGER.UNSIGNED.ZEROFILL;
Sequelize.INTEGER( 11 );

default:
          if (swaggerPropertySchema.maxLength) {
            // http://stackoverflow.com/questions/13932750/tinytext-text-mediumtext-and-longtext-maximum-sto
            // http://stackoverflow.com/questions/7755629/varchar255-vs-tinytext-tinyblob-and-varchar65535-v
            // NOTE: text may be in multibyte format!
            if (swaggerPropertySchema.maxLength > 5592415) {
              return Sequelize.TEXT("long");
            }

            if (swaggerPropertySchema.maxLength > 21845) {
              return Sequelize.TEXT("medium");
            }

            // NOTE: VARCHAR(255) may container 255 multibyte chars: it's _NOT_ byte delimited
            if (swaggerPropertySchema.maxLength > 255) {
              return Sequelize.TEXT();
            }
          }

          return Sequelize.STRING; // === VARCHAR
      }

    case "array":
      if (dialect === "postgres") {
        return Sequelize.ARRAY(getSequalizeType(swaggerPropertySchema.items));
      }
      console.log(
        "Warning: encountered",
        JSON.stringify(swaggerPropertySchema)
      );
      console.log(
        "Can only handle array for postgres (yet?), see http://docs.sequelizejs.com/en/latest/api/datatypes/#array, falling back to blob"

params: [db.queryInterface, Sequelize]
    },
    storageOptions: {
      // The configured instance of Sequelize.
      sequelize: db,
      // this one is actually undocumented
      schema: 'zappr_meta',
      // The name of the to be used model.
      // (not sure if we need this actually)
      modelName: 'SequelizeMeta',
      // The name of table to create if `model` option is not supplied
      tableName: 'migrations',
      // The name of table column holding migration name.
      columnName: 'migration',
      // The type of the column holding migration name.
      columnType: new Sequelize.TEXT
    }
  })
  await db.createSchemas()
  // apply migrations
  await umzug.up({from: nconf.get('DB_UMZUG_FROM') || null})
  init().listen(port)
  info(`listening on port ${port}`)
  if (opts.metricsEnabled) {
    const actualMetricsPort = opts.metricsPort || 3003
    initMetrics().listen(actualMetricsPort)
    info(`metrics available on port ${actualMetricsPort}`)
  }
}

return Sequelize.DATE;

        case "uuid":
          return Sequelize.UUID;

        default:
          if (swaggerPropertySchema.maxLength) {
            // http://stackoverflow.com/questions/13932750/tinytext-text-mediumtext-and-longtext-maximum-sto
            // http://stackoverflow.com/questions/7755629/varchar255-vs-tinytext-tinyblob-and-varchar65535-v
            // NOTE: text may be in multibyte format!
            if (swaggerPropertySchema.maxLength > 5592415) {
              return Sequelize.TEXT("long");
            }

            if (swaggerPropertySchema.maxLength > 21845) {
              return Sequelize.TEXT("medium");
            }

            // NOTE: VARCHAR(255) may container 255 multibyte chars: it's _NOT_ byte delimited
            if (swaggerPropertySchema.maxLength > 255) {
              return Sequelize.TEXT();
            }
          }

          return Sequelize.STRING; // === VARCHAR
      }

    case "array":
      if (dialect === "postgres") {
        return Sequelize.ARRAY(getSequalizeType(swaggerPropertySchema.items));
      }
      console.log(

type: Sequelize.DATE,
		allowNull: false,
		defaultValue: Sequelize.NOW
	},
	post_date_gmt : {
		type: Sequelize.DATE,
		allowNull: false,
		defaultValue: Sequelize.NOW
	},
	post_content  : {
		type: Sequelize.TEXT,
		allowNull: false,
		defaultValue: ''
	},
	post_title: {
		type: Sequelize.TEXT( 'tiny' ),
		allowNull: false
	},
	post_excerpt: {
		type: Sequelize.TEXT( 'tiny' ),
		allowNull: false,
		defaultValue: ''
	},
	post_status: {
		type: Sequelize.STRING( 20 ),
		allowNull: false,
		defaultValue: 'publish'
	},
	comment_status: {
		type: Sequelize.STRING( 20 ),
		allowNull: false,
		defaultValue: 'open'

type: DataTypes.STRING
            },
            sig: {
                allowNull: false,
                type: DataTypes.STRING,
                validate: {
                    is: ["^[a-f0-9]{130}$"]
                }
            },
            signer: {
                allowNull: false,
                type: DataTypes.STRING
            },

            errorHint: {
                type: Sequelize.TEXT("MEDIUM")
            },
            timestamp: {
                type: DataTypes.INTEGER
            },
            isPending: {
                allowNull: false,
                type: DataTypes.BOOLEAN
            },
            pendingTimestamp: {
                type: DataTypes.INTEGER
            },
            createdAt: {
                allowNull: false,
                type: DataTypes.DATE
            },
            updatedAt: {